WO2005093384A1 - Element de mesure de force destine a mesurer le poids d'une personne sur un siege de vehicule automobile - Google Patents

Element de mesure de force destine a mesurer le poids d'une personne sur un siege de vehicule automobile Download PDF

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Publication number
WO2005093384A1
WO2005093384A1 PCT/EP2004/014876 EP2004014876W WO2005093384A1 WO 2005093384 A1 WO2005093384 A1 WO 2005093384A1 EP 2004014876 W EP2004014876 W EP 2004014876W WO 2005093384 A1 WO2005093384 A1 WO 2005093384A1
Authority
WO
WIPO (PCT)
Prior art keywords
force measuring
motor vehicle
sleeve
measuring body
vehicle seat
Prior art date
Application number
PCT/EP2004/014876
Other languages
German (de)
English (en)
Inventor
Michael Schurr
Volker Schmuecker
Original Assignee
Soehnle-Waagen Gmbh & Co. Kg
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 Soehnle-Waagen Gmbh & Co. Kg filed Critical Soehnle-Waagen Gmbh & Co. Kg
Publication of WO2005093384A1 publication Critical patent/WO2005093384A1/fr

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • B60R21/0152—Passenger detection systems using force or pressure sensing means using strain gauges

Definitions

  • the invention relates to a force measuring element for measuring the weight of a person on a motor vehicle seat, which can be arranged between the motor vehicle seat and the seat holder of the motor vehicle and has a sleeve which can be fastened to the motor vehicle seat and in which an elongate force measuring body, which has strain gauges, is arranged horizontally and on one end is firmly connected to the sleeve and at the other end can be connected to the seat holder, the sleeve covering the force measuring element including the strain gauges up to an existing ring on the force measuring element and the annular gap which arises between the ring and the sleeve limits the maximum weight absorption.
  • Such force measuring elements in which the shear stress is measured with the strain gauges, are known (DE 196 98 108, US 6,002,090, DE 100 35 483 AI, WO 02/08705 AI). Measuring the shear stress is intended to prevent forces independent of the weight from influencing the measurement result.
  • the object of the invention is therefore to create a force measuring element of the type mentioned above which does not have these disadvantages.
  • the force measuring body has a horizontal bore transverse to its longitudinal extension and the strain gauges are arranged on the bending beams formed on both sides of the bore for measuring the bending stress.
  • the force measuring body is provided with an opening, so that bending beams are formed above and below this opening, which - in an approximation - behave like two parallel links, so that when the force measuring body is deflected, an S-shaped deformation occurs and at the "articulation points" a strong stretch occurs, which can be converted into an output signal with the strain gauges.
  • Figure 2 shows the embodiment in perspective
  • Figure 3 shows the embodiment in perspective with the force measuring body removed and shown separately.
  • FIG. 1 shows the force measuring element 1, consisting of a sleeve 2 and an elongated force measuring body 3 arranged therein. This is screwed into the right end (in FIG. 1) of the sleeve 2.
  • the flange 4 on the force measuring body 3, together with the shoulder 8 inside the sleeve 2, serves to fix the position.
  • the force measuring body 3 has at its left end a bolt 6 provided with an external thread 5. It is used to fasten the force measuring body 3 to a seat holder 11 in a motor vehicle by screwing it with a nut 10.
  • the sleeve 2 is screwed into an opening 12 in a component 13 which serves to mount the motor vehicle seat.
  • the fixing takes place on the shoulder 30 on the outside of the sleeve 2.
  • the shoulder 30 can also be arranged on the left side of the sleeve 2 between the seat holder 11 and component 13 of the motor vehicle seat.
  • the force measuring body also has a ring 9. Between this and the inner surface of the sleeve 2 there is an annular gap 14, which the maximum deformation of the force measuring body 3rd limited, namely in that when a certain maximum load is exceeded as a result of deformation of the force measuring body 3, the inner surface of the sleeve 2 strikes the outer surface of the ring 9.
  • the force measuring body 3 is penetrated in its center by a horizontal bore 15, which results in the formation of two bending beams 16 and 17 between the bore and the outer surface of the force measuring body 3 at this point.
  • the bending beams 16, 17 between the bore 15 and the outer surfaces of the force measuring element 3 behave like parallel links which are particularly sensitive and enable accurate measurement.
  • the bending stress is measured by four strain gauges 18, 19, 20, 21, which are interconnected in a manner known per se to form a Wheatstone 'bridge and thus provide an output signal from which the weight can be derived and which is used to trigger a Airbag control.
  • the connecting wires 23 are guided through an axial bore 24 in the force measuring body 3 to the outside.

Abstract

L'invention concerne un élément de mesure de force destiné à mesurer le poids d'une personne sur un siège de véhicule automobile, lequel élément peut être placé entre le siège (13) du véhicule automobile et la fixation (11) de siège du véhicule automobile et comporte un manchon (2) pouvant être fixé sur le siège du véhicule automobile et dans lequel est placé, horizontalement, un corps de mesure de force (3) oblong sur lequel sont placées des jauges extensométriques (18, 19, 20, 21), lequel corps est relié au manchon (2), de manière rigide, au niveau de sa première extrémité et peut être relié à la fixation (11) de siège au niveau de son autre extrémité, ledit manchon recouvrant le corps de mesure de force (3), y compris les jauges extensométriques (18, 19, 20, 21), jusqu'à un anneau (9) prévu sur le corps de mesure de force et l'espace annulaire (14), formé entre l'anneau (9) et le manchon (2), définissant le poids maximal pouvant être absorbé. Ladite invention se caractérise en ce que le corps de mesure de force (3) présente un alésage horizontal (15) transversalement à son extension longitudinale et, pour la mesure de la contrainte de flexion, les jauges extensométriques (18, 19, 20, 21) sont placées sur les barres de flexion (16, 17) formées à travers l'alésage (15) des deux côtés de ce dernier.
PCT/EP2004/014876 2004-03-09 2004-12-31 Element de mesure de force destine a mesurer le poids d'une personne sur un siege de vehicule automobile WO2005093384A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410011845 DE102004011845A1 (de) 2004-03-09 2004-03-09 Kraftmesselement zur Messung des Gewichts einer Person auf einem Kraftfahrzeugsitz
DE102004011845.0 2004-03-09

Publications (1)

Publication Number Publication Date
WO2005093384A1 true WO2005093384A1 (fr) 2005-10-06

Family

ID=34895200

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/014876 WO2005093384A1 (fr) 2004-03-09 2004-12-31 Element de mesure de force destine a mesurer le poids d'une personne sur un siege de vehicule automobile

Country Status (2)

Country Link
DE (1) DE102004011845A1 (fr)
WO (1) WO2005093384A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103043023A (zh) * 2011-10-14 2013-04-17 现代摩比斯株式会社 乘客识别装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9121748B2 (en) * 2011-07-28 2015-09-01 Ts Tech Co., Ltd. Support structure for load measurement sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505496A1 (fr) * 1981-05-11 1982-11-12 Toux Jacques Dispositif capteur de force pour appareil de mesure et appareil de mesure, notamment appareil de pesage, equipe d'un tel dispositif
US6002090A (en) * 1995-06-16 1999-12-14 Weigh-Tronix, Inc. Force sensitive scale for fork lifts with electronically coupled load sensors
WO2002008705A1 (fr) * 2000-07-21 2002-01-31 Gwt Global Weighing Technologies Gmbh Transducteur de force pour siege de vehicule
DE20218478U1 (de) * 2001-12-21 2003-03-06 Sartorius Gmbh Meßvorrichtung und Sitzanordnung
WO2003060439A1 (fr) * 2002-01-21 2003-07-24 Sartorius Ag Capteur de force

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505496A1 (fr) * 1981-05-11 1982-11-12 Toux Jacques Dispositif capteur de force pour appareil de mesure et appareil de mesure, notamment appareil de pesage, equipe d'un tel dispositif
US6002090A (en) * 1995-06-16 1999-12-14 Weigh-Tronix, Inc. Force sensitive scale for fork lifts with electronically coupled load sensors
WO2002008705A1 (fr) * 2000-07-21 2002-01-31 Gwt Global Weighing Technologies Gmbh Transducteur de force pour siege de vehicule
DE20218478U1 (de) * 2001-12-21 2003-03-06 Sartorius Gmbh Meßvorrichtung und Sitzanordnung
WO2003060439A1 (fr) * 2002-01-21 2003-07-24 Sartorius Ag Capteur de force

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103043023A (zh) * 2011-10-14 2013-04-17 现代摩比斯株式会社 乘客识别装置
CN103043023B (zh) * 2011-10-14 2015-09-02 现代摩比斯株式会社 乘客识别装置

Also Published As

Publication number Publication date
DE102004011845A1 (de) 2005-09-29

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