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WO1994021480A1 - Systeme de detection des forces s'exerçant sur un vehicule - Google Patents

Systeme de detection des forces s'exerçant sur un vehicule Download PDF

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Publication number
WO1994021480A1
WO1994021480A1 PCT/GB1994/000563 GB9400563W WO9421480A1 WO 1994021480 A1 WO1994021480 A1 WO 1994021480A1 GB 9400563 W GB9400563 W GB 9400563W WO 9421480 A1 WO9421480 A1 WO 9421480A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
measuring device
load cell
forces
supporting unit
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
PCT/GB1994/000563
Other languages
English (en)
Inventor
Michael Appleyard
John Stuart FORRESTER
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of WO1994021480A1 publication Critical patent/WO1994021480A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/001—Arrangements for attachment of dampers
    • B60G13/005—Arrangements for attachment of dampers characterised by the mounting on the axle or suspension arm of the damper unit
    • B60G13/008—Arrangements for attachment of dampers characterised by the mounting on the axle or suspension arm of the damper unit involving use of an auxiliary cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/07—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the damper being connected to the stub axle and the spring being arranged around the damper
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0061—Force sensors associated with industrial machines or actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/312—The spring being a wound spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • B60G2204/112—Mounting of sensors thereon on dampers, e.g. fluid dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • B60G2204/115—Wheel hub bearing sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/129—Damper mount on wheel suspension or knuckle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/60—Load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/60—Load
    • B60G2400/64—Wheel forces, e.g. on hub, spindle or bearing

Definitions

  • This invention relates to the measurement of loads on wheels of a vehicle, in order, for example, to provide an input signal for initiating auxiliary equipment such as an active suspension control system for the vehicle, or for altering the threshold of a braking system for the vehicle, for example an anti-lock braking system.
  • auxiliary equipment such as an active suspension control system for the vehicle
  • a braking system for the vehicle, for example an anti-lock braking system.
  • the present invention relates to a system for providing measurements indicative of wheel load, as well as measurements indicative of the brake torque and/or the traction forces and/or the cornering force operating on a vehicle. It will be appreciated that these forces act on mutually perpendicular axes. Previously, the measurement of all three forces has required the use of multiple sensors.
  • US 5 127 277 shows such a sensor used to monitor the vertical load.
  • a load measuring device monitors the load at the top end of a strut to which it is attached, typically a MacPhearson strut.
  • Such a measuring device is susceptible to being effected by dampers and the like and so does not give data representative of true dynamic load.
  • Such a measurement requires monitoring the dynamic forces on three mutually perpendicular axes.
  • the vertical drag, brake torque and road surface friction are determined by way of a stress detection sensor located and secured in a hole in the vehicle axle, a detection signal from the stress detection sensor then being processed in a signal processing unit.
  • the sensor is secured in the hole by means of a filler, the filler serving to locate the sensor and to protect it from the external environment.
  • This construction has the disadvantage that it requires a hole to be formed in the axle of the vehicle. Also, once embedded in the filler the sensor cannot be maintained or serviced in the event of malfunction.
  • a load measuring device to be incorporated in a vehicle wheel load supporting unit measures the force acting on three mutually perpendicular axes.
  • the load measuring unit comprises a sleeve slidably mounted about the load supporting unit and supported in relation thereto by load detecting means.
  • the load detecting means comprises a load cell.
  • the load detecting means connects the bottom of the load supporting means to the bottom of the sleeve.
  • the load cell may be of cruciform configuration.
  • the load detecting means is provided with a plurality of strain gauges.
  • the load detecting means is provided with a plurality of screen printed piezo-resistive elements.
  • the strain sensitive elements are arranged in a suitable configuration from which the three force components can be obtained.
  • Figure 1 shows in .section a known front drive suspension system
  • Figure 2 shows in section a front drive suspension system incorporating a suspension strut according to the invention
  • Figure 3 shows a section through a strut according to the invention
  • Figure 4 shows a perspective view of a load cell for use with the strut of Figure 3;
  • Figure 5 shows a part section through a strut having a second version of a load cell in accordance with the invention
  • Figure 6 shows a perspective view of a load cell for use with the strut of Figure 5;
  • Figure 7 shows a section through a strut having a third version of a load cell in accordance with the invention.
  • Figure 8 shows a perspective view of a load cell for use with the strut of Figure 7;
  • Figure 9 shows a section through a strut having a fourth version of a load cell in accordance with the invention.
  • Figure 10 shows a perspective view of a load cell for use with the strut of Figure 9.
  • FIG. 1 a known front wheel drive suspension system is shown.
  • the system includes a MacPhearson strut 1/hub assembly 2 and brake assembly 3.
  • FIG. 2 shows how this arrangement may be modified in accordance with the invention.
  • a sleeve 10 is fitted over the existing strut 11 so that it is attached to the bottom 12 of the existing strut 11 through a load cell 13.
  • the sleeve 10 is slidably mounted at its top end.
  • forces Pvert 85, Plong 86 and Plat 87 will act through the load cell.
  • the forces imposed on the vehicle body by the top of the strut are Rvert 95, Rlong 96 and Rlat 97.
  • the magnitude of these forces can be determined by taking moments about points A and B.
  • T (longitudinal) F (longitudinal)
  • T (longitudinal) acting at 98 is the longitudinal force reaction when traction torque is applied to the wheel via the drive shaft and taking moments about B
  • the three components can be calculated/extracted using any suitable electronic processing means.
  • the load cell may take a number of forms, examples of which are shown in Figures 3-10.
  • FIGS 3 and 4 show a load cell 13 comprising a flat plate 15 attached around its circumference 16 to the sleeve 10 and through a control boss or column 17 to the existing strut 11.
  • Four holes 18 are so positioned so as to concentrate the stresses acting on the plate 15 to enable the three independent forces to be determined.
  • strain gauges 21-28 may be bonded to the plate and arranged in three separate Wheatstone bridge formats. Each Wheatstone bridge represents a separate set of forces. A suitable arrangement would be for strain gauges 21 and 22 to measure Plong, strain gauges 23 and 24 to measure Plat and strain gauges 25, 26, 27 and 28 to measure Pvert.
  • the plate 15 could be screen printed with piezo-resistive elements. Such a construction would be more robust and provide a lower cost unit.
  • the load cell 13 is of cruciform configuration. In this arrangement the ends of the arms 45-48 of the load cell 13 are simply supported at their outer ends by support means 49 formed on the sleeve 10. The centre of the load cell 13 is rigidly attached to the existing strut 11 through a central boss or column 17. Each arm of the load cell acts as a cantilever with a direct load applied due to Pvert and end loads applied due to Plong and Plat.
  • the ends of the arms of the load cell are once again supported by support means 49. However the arms thicken leading to a thicker, stiffer central section 50 of the load cell 13. This central section 50 then supports Pvert with the thinner sectioned supported outer ends of the arms being subject to similar stress levels in the longitudinal and lateral directions, thus improving the sensitivity when monitoring Plong and Plat.
  • Pvert may be measured directly by way of the stresses in the central boss or column 17 itself.
  • FIGS. 9 and 10 show a further form of the load cell 13. Again, where appropriate similar reference numerals are used to represent similar parts.
  • a plate 15 is connected to the sleeve 10 surrounding the strut 11.
  • the plate is provided with four spaced columns 60, 61, 62, 63.
  • a top ring 66 is supported by the columns.
  • the strut is provided with an abutment 70 in the form of a ring welded thereto. In use the top ring 66 locates against the abutment 70.
  • the four columns 60, 61, 62, 63 thus support the vertical load Pvert through the abutment 70 and also reacts to longitudinal (Plong) and lateral (Plat) forces.
  • Strain gauge elements 71-76 shown on one column 63 can be arranged as shown, where strain gauges 71 and 72 measure Pvert, and the other strain gauges 73, 74, 75, 76 measure Plong and Plat.
  • This arrangement may be repeated on the other three columns to compensate for eccentric loading and Wheatstone bridge temperature compensation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

Un dispositif de mesure de charge conçu pour un véhicule permet d'effectuer des mesures indiquant la charge d'une roue, ainsi que des mesures indiquant le couple de freinage et/ou les forces de traction s'exerçant sur un véhicule en cours de fabrication. Le dispositif est incorporé dans un ensemble de support de charge de la roue du véhicule (11) et mesure les forces s'exerçant sur trois axes réciproquement perpendiculaires (85, 86, 87).
PCT/GB1994/000563 1993-03-20 1994-03-18 Systeme de detection des forces s'exerçant sur un vehicule Ceased WO1994021480A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939305841A GB9305841D0 (en) 1993-03-20 1993-03-20 Vehicle force transducer system
GB9305841.0 1993-03-20

Publications (1)

Publication Number Publication Date
WO1994021480A1 true WO1994021480A1 (fr) 1994-09-29

Family

ID=10732469

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/000563 Ceased WO1994021480A1 (fr) 1993-03-20 1994-03-18 Systeme de detection des forces s'exerçant sur un vehicule

Country Status (2)

Country Link
GB (1) GB9305841D0 (fr)
WO (1) WO1994021480A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659385A3 (fr) * 2004-11-22 2006-06-21 JTEKT Corporation Dispositif de roulement avec capteur
EP1749720A1 (fr) * 2005-08-02 2007-02-07 JTEKT Corporation Système de détection de la force d'action d'une roue et procédé de détection de la force d'action d'une roue
WO2008067392A3 (fr) * 2006-11-28 2008-10-16 Timken Co Capteur de charge et procede de detection de charge
WO2022258567A3 (fr) * 2021-06-09 2023-03-02 Robert Bosch Gmbh Capteur d'accélération, véhicule automobile et procédé pour déterminer une force de contact au sol d'un pneumatique
CZ310309B6 (cs) * 2018-09-27 2025-02-12 VÚTS, a.s., Liberec Měřicí vodítko pro měření radiální komponenty kontaktní síly mezi pístní tyčí a vedením pístní tyče v tlumiči kolového vozidla

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244338A1 (de) * 1972-09-09 1974-03-21 Fichtel & Sachs Ag Anordnung zum messen der daempfkraft
US3879995A (en) * 1974-05-13 1975-04-29 Ford Motor Co Strain gage transducer
US4094192A (en) * 1976-09-20 1978-06-13 The Charles Stark Draper Laboratory, Inc. Method and apparatus for six degree of freedom force sensing
EP0143434A2 (fr) * 1983-11-26 1985-06-05 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Moyeu de mesure
WO1987002129A1 (fr) * 1985-09-25 1987-04-09 Pfister Gmbh Connexion elastique entre au moins deux parties rigides
GB2190201A (en) * 1986-05-09 1987-11-11 Yamato Scale Co Ltd Measuring components of force and moment applied to vehicle tire
EP0315163A2 (fr) * 1987-11-06 1989-05-10 Pfister GmbH Méthode pour l'optimisation des caractéristiques de roulage d'un véhicule
EP0337488A2 (fr) * 1988-04-15 1989-10-18 Honda Giken Kogyo Kabushiki Kaisha Suspension
EP0432122A2 (fr) * 1989-12-04 1991-06-12 SKF Nova AB Moyeu à palier pour véhicules
DE4117462A1 (de) * 1990-05-28 1991-12-05 Atsugi Unisia Corp Lastsensor
US5127277A (en) * 1989-07-26 1992-07-07 Lucas Industries Public Limited Co. Measuring loads on vehicle wheels
EP0504731A2 (fr) * 1991-03-19 1992-09-23 Japan Electronics Industry, Ltd. Dispositif pour mesurer la force d'action d'une roue et dispositif pour mesurer la contrainte de structure

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2244338A1 (de) * 1972-09-09 1974-03-21 Fichtel & Sachs Ag Anordnung zum messen der daempfkraft
US3879995A (en) * 1974-05-13 1975-04-29 Ford Motor Co Strain gage transducer
US4094192A (en) * 1976-09-20 1978-06-13 The Charles Stark Draper Laboratory, Inc. Method and apparatus for six degree of freedom force sensing
EP0143434A2 (fr) * 1983-11-26 1985-06-05 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Moyeu de mesure
WO1987002129A1 (fr) * 1985-09-25 1987-04-09 Pfister Gmbh Connexion elastique entre au moins deux parties rigides
GB2190201A (en) * 1986-05-09 1987-11-11 Yamato Scale Co Ltd Measuring components of force and moment applied to vehicle tire
EP0315163A2 (fr) * 1987-11-06 1989-05-10 Pfister GmbH Méthode pour l'optimisation des caractéristiques de roulage d'un véhicule
EP0337488A2 (fr) * 1988-04-15 1989-10-18 Honda Giken Kogyo Kabushiki Kaisha Suspension
US5127277A (en) * 1989-07-26 1992-07-07 Lucas Industries Public Limited Co. Measuring loads on vehicle wheels
EP0432122A2 (fr) * 1989-12-04 1991-06-12 SKF Nova AB Moyeu à palier pour véhicules
DE4117462A1 (de) * 1990-05-28 1991-12-05 Atsugi Unisia Corp Lastsensor
EP0504731A2 (fr) * 1991-03-19 1992-09-23 Japan Electronics Industry, Ltd. Dispositif pour mesurer la force d'action d'une roue et dispositif pour mesurer la contrainte de structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1659385A3 (fr) * 2004-11-22 2006-06-21 JTEKT Corporation Dispositif de roulement avec capteur
EP1818660A1 (fr) * 2004-11-22 2007-08-15 JTEKT Corporation Appareil de revêtement de rouleau monté sur capteur
US7497131B2 (en) 2004-11-22 2009-03-03 Jtekt Corporation Sensor-mounted roller bearing apparatus
EP1749720A1 (fr) * 2005-08-02 2007-02-07 JTEKT Corporation Système de détection de la force d'action d'une roue et procédé de détection de la force d'action d'une roue
WO2008067392A3 (fr) * 2006-11-28 2008-10-16 Timken Co Capteur de charge et procede de detection de charge
CZ310309B6 (cs) * 2018-09-27 2025-02-12 VÚTS, a.s., Liberec Měřicí vodítko pro měření radiální komponenty kontaktní síly mezi pístní tyčí a vedením pístní tyče v tlumiči kolového vozidla
WO2022258567A3 (fr) * 2021-06-09 2023-03-02 Robert Bosch Gmbh Capteur d'accélération, véhicule automobile et procédé pour déterminer une force de contact au sol d'un pneumatique

Also Published As

Publication number Publication date
GB9305841D0 (en) 1993-05-05

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