EP1361967A2 - Dispositif destine a capter une force agissant sur un siege de vehicule - Google Patents

Dispositif destine a capter une force agissant sur un siege de vehicule

Info

Publication number
EP1361967A2
EP1361967A2 EP02708162A EP02708162A EP1361967A2 EP 1361967 A2 EP1361967 A2 EP 1361967A2 EP 02708162 A EP02708162 A EP 02708162A EP 02708162 A EP02708162 A EP 02708162A EP 1361967 A2 EP1361967 A2 EP 1361967A2
Authority
EP
European Patent Office
Prior art keywords
seat
spring element
spring
base plate
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.)
Withdrawn
Application number
EP02708162A
Other languages
German (de)
English (en)
Inventor
Andreas Aumer
Ulrich Deml
Manfred Frimberger
Karl-Heinz Eglseder
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP1361967A2 publication Critical patent/EP1361967A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/003—Measuring variation of fuel pressure in high pressure line
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/14—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by electromagnetic elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0026—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means
    • G01L9/0029—Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means using variations in inductance

Definitions

  • the invention relates to a device for absorbing a force acting on a seat, in particular a vehicle seat.
  • the determination of the occupant weight is becoming increasingly important.
  • the occupant weight and possibly also the weight distribution over the vehicle seat are suitable parameters for determining an "out of position" of the occupant. With such an "out of position” attitude of the occupant, a complete inflation of the airbag can do more harm to the occupant than it does good.
  • Such "out of position” cases occur when the occupant bends his head directly in front of the airbag outlet opening. In particular, small, light people are at risk because of their stature sit far in front of the steering wheel and may be at risk if the airbag is deployed suddenly.
  • the determination of the occupant weight is usually necessary in conjunction with optical or other means for occupant position detection in order to determine whether one or more stages of a multi-stage airbag are to be activated. This minimizes the risk of injury to the occupant.
  • DE 38 09 074 AI discloses a device in which pressure sensors attached to the seat support components carrying the seat cushion and the seat back indicate a change in weight. A front and a rear sensor, measuring pressure forces, is attached to each seat rail.
  • Strain gauges, capacitive or piezoelectric elements are generally used to absorb pressure changes.
  • a disadvantage of such a measuring device is that very small deformations on the existing seat structure must be detected by sensors. Path changes in the tens of ⁇ range pose a problem with regard to the resolution of the measurement signal.
  • the measuring arrangement must also be protected against overload. To do this, mechanical stops in the range of a few tens of ⁇ m would have to be produced in the known measuring device.
  • Geometric changes due to temperature influences have the same orders of magnitude as the measured variable in the known measuring device.
  • the known measuring device therefore requires a device for compensating for such temperature influences.
  • the invention is therefore based on the object of specifying a device for absorbing a force acting on a seat, which ensures good resolution and is susceptible to faults.
  • the invention is solved by the features of patent claim 1.
  • a spring element is additionally introduced into the existing seat support structure, which couples the seat support components to one another.
  • the seat with seat cushion and seat back attached to the seat support structure is thus spring-loaded.
  • a sensor is provided which records the spring travel of the spring element or a change in the spring travel or a position of the spring element.
  • Seat support components are essentially seat structures that support the seat with seat upholstery and backrest, in particular a base plate for the seat - in the case of a vehicle seat this is usually the bottom part of the body - seat rails for moving the seat that holds the seat with the seat rails connecting slides or seat struts that slide in the seat rails to hold the seat cushion or backrest.
  • the spring element is introduced into the force path “seat - seat rail - base plate” in such a way that it yields resiliently as soon as a force and in particular a weight force caused by an object or an occupant on the seat acts on the seat.
  • the spring element has a large spring travel and therefore delivers a significant signal.
  • the weight as a force quantity is determined by measuring the spring travel / the deformation of the spring element. There is preferably proportionality between the quantities force and spring travel.
  • the spring element has a defined spring constant, so that a certain deformation of the spring element stands for a certain weight force acting on the spring element.
  • the spring element is defined to be resilient when the weight load is transmitted via seat support components, and returns to its starting position when the weight load is ended.
  • a spring travel is generated when the vehicle seat is loaded, which allows a very good resolution of the force quantity to be determined.
  • a spring travel generated as a result of temperature change is negligible compared to a spring travel generated by the action of force.
  • Components do not require an extremely high tolerance accuracy, so that the device can be manufactured inexpensively.
  • a standard sensor can also be used as a sensor for measuring the spring travel. The route measurement is technically possible and can also be industrialized.
  • the spring travel is preferably greater than or equal to 0.1 mm, in particular greater than or equal to 0.5 mm, and approximately 1 mm for a particularly good resolution.
  • the maximum deflection is less than 5 mm.
  • a distance traveled by the spring element of 1/100 mm can be resolved using commercially available sensors, which corresponds, for example, to a weight load of 1 kg with a spring constant of 10 6 N / m. The weight can therefore be measured to the nearest kg.
  • the spring element with associated sensor can preferably be arranged between a seat rail and a base plate as seat support components. Then a spring element with an associated sensor is preferably provided at each support point between the seat rail and base plate, ie preferably 4 spring element / sensor arrangements at the ends of the seat rails between seat rail and base plate.
  • the spring element with sensor can be arranged between the seat and the seat rail, again preferably in each support point, i.e. total 4
  • a spring element couples a carriage (3) which supports the seat and is displaceably mounted in the seat rail (2) with a seat strut (4), or else a first component of the carriage with a further component of the carriage.
  • Figure 1 shows a first embodiment of the invention in cross section.
  • Fig. 2 shows another embodiment of the invention in cross section.
  • FIG. 1 shows a device for absorbing a force F acting on a seat.
  • FIG. 1 Only a small section of a seat support structure is shown in cross section at one end of a seat rail 2.
  • the seat rail 2 ends in FIG. 1 on the right-hand side and is coupled via a spring element 5 to a base plate 1, which in turn is shown only in one section in its longitudinal extent.
  • the spring element 5 is surrounded by a housing 6.
  • the housing 6 is preferably a hollow profile body. The housing 6 protects the spring element 5 and in particular the sensor presented further below.
  • Bores 61 of the housing 6 allow a screw connection between the seat rail 2 and the spring element 5.
  • a fastening screw 9 is guided through the bore 61.
  • Two nuts 10 fix the seat rail 2 to the fastening screw 9, a further nut 10 and a stop 11 designed as a nut in turn fix the spring element 5 to the fastening screw 9.
  • the spring element 5 is a steel spring in the form of a leaf spring, with several spring layers which can also be seen in FIG. 1.
  • single-layer spring steel can also be used.
  • other spring shapes can be used, such as a spiral spring.
  • the spring element 5 is connected to the base plate 1 by fastening screws 7.
  • the base plate is a component of the body, namely the vehicle floor.
  • spacers 8 are provided which, if appropriate together with housing components, hold the spring element 5 at a sufficient distance above the base plate 1 that the maximum desired or possible deflection of the spring element 5 in the direction of the base plate 1 is ensured is.
  • the spring steel is the flexible spring element that allows deflections in the mm range, depending on the force acting on it in the direction of the arrow. Due to its edge-side clamping by the fastening screws 7, the spring element 5 is maximally deflected in its center. Reference number 51 denotes this location. In Figure 1, the spring element 5 is of course not subjected to any force and can be seen in its rest position.
  • a suitable sensor for determining the absolute position of the spring element 5, or for determining the spring travel covered, or for determining a change in spring travel is preferably also to be provided.
  • the sensor can be based on different physical principles. It can be used: a Hall sensor, an LVDT c ⁇ ⁇ ot P> cn o Cn o cn O cn
  • the spring elements Due to the above-described resilient mounting of the seat rails with respect to the base plate / body, the spring elements are deflected. This deflection is measured with the associated sensors. By calculating the four sensor signals provided in this case, the force acting on the seat can be deduced, at least in the vertical direction.
  • Figure 2 shows a further embodiment of the invention in a cross-sectional view.
  • a seat support structure is shown in cross-section at one end of a seat rail 2.
  • the seat rail 2 ends on the right in FIG Seat rail 2 stored.
  • the sled 3 is often referred to in the professional world as the seat shell.
  • the seat rail 3 is attached to a base plate, not shown.
  • the carriage 3 is coupled to a seat stay 4.
  • the seat stay in turn carries the seat cushion and the rest of the seat structure.
  • the coupling between the slide 3 and the seat strut 4 takes place via a spring element 5.
  • the spring element is therefore arranged at a different point in the force path within the seat support structure, but also reliably absorbs the weight force acting on the seat at this point.
  • FIG. 2 For the use of the arrangement in a motor vehicle for determining a force acting on a vehicle seat, several of these arrangements according to FIG. 2 are preferably to be provided.
  • a coupling of the seat strut with the same structure is also provided with the slide via a further spring element.
  • the seat is thus resiliently mounted on the slide, with two support points at the ends of the slide.
  • the other side of the slide, which engages in the further seat rail, is also provided with spring elements at its ends.

Abstract

L'invention concerne un dispositif destiné à capter une force agissant sur un siège, en particulier un siège de véhicule, qui comporte au moins un élément faisant ressort (5) servant à la suspension élastique du siège, les composants de support de siège (1, 2, 3, 4) étant mutuellement reliés par l'intermédiaire de cet élément faisant ressort (5), ainsi qu'un capteur servant à capter la course élastique ou une modification de la course élastique ou d'une position de l'élément faisant ressort.
EP02708162A 2001-02-23 2002-01-25 Dispositif destine a capter une force agissant sur un siege de vehicule Withdrawn EP1361967A2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10108822 2001-02-23
DE10108822 2001-02-23
DE10114312 2001-03-23
DE10114312 2001-03-23
PCT/DE2002/000262 WO2002066282A2 (fr) 2001-02-23 2002-01-25 Dispositif destine a capter une force agissant sur un siege de vehicule

Publications (1)

Publication Number Publication Date
EP1361967A2 true EP1361967A2 (fr) 2003-11-19

Family

ID=26008611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708162A Withdrawn EP1361967A2 (fr) 2001-02-23 2002-01-25 Dispositif destine a capter une force agissant sur un siege de vehicule

Country Status (5)

Country Link
US (1) US20040154843A1 (fr)
EP (1) EP1361967A2 (fr)
JP (1) JP2004517779A (fr)
KR (1) KR20030077038A (fr)
WO (1) WO2002066282A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005106800A (ja) * 2003-09-09 2005-04-21 Matsushita Electric Ind Co Ltd 歪検出装置
JP2007085994A (ja) * 2005-09-26 2007-04-05 Matsushita Electric Ind Co Ltd 歪検出装置
FR2983954B1 (fr) * 2011-12-13 2014-09-12 Renault Sa Ressort avec capteur de deformation integre.
US9227526B2 (en) * 2014-02-27 2016-01-05 Delphi Technologies, Inc. Occupant detection device with temperature compensation
CN112304401A (zh) * 2020-09-23 2021-02-02 山东科瑞机械制造有限公司 一种带缓冲的称重机构

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Publication number Priority date Publication date Assignee Title
US597432A (en) * 1898-01-18 be eedon
DE3147576A1 (de) * 1981-12-01 1983-06-09 Dietrich 8130 Starnberg Hasse Vorrichtung bzw. anlage zum steuern von wenigstens einem stromkreis bei kraftfahrzeugen
CH680385A5 (fr) * 1989-10-04 1992-08-14 Hans Meyer
US5573269A (en) * 1993-12-02 1996-11-12 Trw Vehicle Safety Systems Inc. Apparatus and method for sensing and restraining an occupant of a vehicle seat
DE19602087C2 (de) * 1996-01-20 2000-03-23 Bayerische Motoren Werke Ag Vorrichtung zur Sitzbelegungserkennung
US5864295A (en) * 1996-03-21 1999-01-26 Trw Inc. Apparatus for sensing occupant weight in an actuatable restraint system
US5991676A (en) * 1996-11-22 1999-11-23 Breed Automotive Technology, Inc. Seat occupant sensing system
US5739757A (en) * 1997-01-30 1998-04-14 Breed Automotive Technology, Inc. Vehicle passenger weight sensor
US5714695A (en) * 1997-02-04 1998-02-03 Sentek Products Helical load cell
US5971432A (en) * 1997-02-15 1999-10-26 Breed Automotive Technology, Inc. Seat occupant sensing system
US5810392A (en) * 1997-02-15 1998-09-22 Breed Automotive Technology, Inc. Seat occupant sensing system
US6039344A (en) * 1998-01-09 2000-03-21 Trw Inc. Vehicle occupant weight sensor apparatus
JP3683712B2 (ja) * 1998-06-05 2005-08-17 タカタ株式会社 シート重量計測装置
US6087598A (en) * 1999-02-03 2000-07-11 Trw Inc. Weight sensing apparatus for vehicle seat
JP2002144936A (ja) * 2000-11-08 2002-05-22 Nhk Spring Co Ltd 自動車シートの着座感知装置

Non-Patent Citations (1)

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Title
See references of WO02066282A2 *

Also Published As

Publication number Publication date
US20040154843A1 (en) 2004-08-12
JP2004517779A (ja) 2004-06-17
KR20030077038A (ko) 2003-09-29
WO2002066282A2 (fr) 2002-08-29
WO2002066282A3 (fr) 2002-11-07

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