EP1842042A1 - Dispositif dynamometrique sur des actionneurs de frein - Google Patents

Dispositif dynamometrique sur des actionneurs de frein

Info

Publication number
EP1842042A1
EP1842042A1 EP06706305A EP06706305A EP1842042A1 EP 1842042 A1 EP1842042 A1 EP 1842042A1 EP 06706305 A EP06706305 A EP 06706305A EP 06706305 A EP06706305 A EP 06706305A EP 1842042 A1 EP1842042 A1 EP 1842042A1
Authority
EP
European Patent Office
Prior art keywords
measuring arrangement
force
arrangement according
force measuring
carbon layer
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Withdrawn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
EP06706305A
Other languages
German (de)
English (en)
Inventor
Holger Lüthje
Saskia Biehl
Andreas Schirling
Bernward Bayer
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Continental Teves AG and Co OHG
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV, Continental Teves AG and Co OHG filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP1842042A1 publication Critical patent/EP1842042A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/005—Force, torque, stress or strain

Definitions

  • the invention relates to a force measuring arrangement for processing force signals in electronic brake systems, in particular vehicle brake systems of a force sensor assembly and a signal processing device, wherein the force sensor assembly comprises a brake actuator and at least one pressure member, wherein on the pressure member an amorphous diamond-like carbon layer is applied as a force sensor.
  • EMB electromechanical brake systems
  • a modification of this full EMB system is the hybrid brake, in which the front axle is still hydraulically braked in a conventional manner, but the rear axle already contains the EMB actuator system including electric parking brake. For this purpose, only a simple electrical system is necessary because the hydraulic system is the legally prescribed second brake circuit.
  • Previously known sensor systems are not suitable for this task.
  • An example is in the DE 103 08 798 Al describes where a pressure measuring arrangement for the redundant processing of pressure signals in electronic brake systems and their use is disclosed.
  • a sensor module is described consisting of a plurality of electrical pressure measuring elements, which are arranged together on a membrane.
  • the known versions of Bremskraftmesseinrich- tions in vehicle brakes are thus either indirectly measuring systems by z. B. the hydraulic pressure with the help of z. B. membrane-type sensors is measured, or sensors are used according to the strain gauge principle, which provide the deformation (elongation or compression) of a pad, usually a specially shaped sensor receptacle.
  • the known solutions are discrete strain gauges which are adhesively bonded to the base bodies and thus require a great deal of calibration effort.
  • Another disadvantage is the lack of system rigidity (deformation is required in DMS) and the poor integration into miniaturized and low-mass brake systems.
  • a force measuring arrangement which has at least one force sensor assembly, wherein the force sensor assembly consists of at least one brake actuator and a pressure member in frictional connection, wherein on the pressure member at least one amorphous carbon layer is applied, which acts as a force sensor.
  • Temperature sensor • Excellent tribological property, corrosion-resistant
  • the measurement of the actual force is made by means of a resistance measurement, which is carried out through the layer and which also allows static measurements over an extended period of time.
  • a resistance measurement which is carried out through the layer and which also allows static measurements over an extended period of time.
  • the amorphous carbon layer Due to its hardness (15-40GPa) and a measuring principle acting in the layer normal, the amorphous carbon layer enables a low-mass and completely rigid measuring arrangement. This makes it possible to use a force sensor in z. B. rotationally symmetric disc shape for this application, which is integrated in brake systems, without the Stiffness and dynamics of the system are adversely affected. Furthermore, the coating is extremely wear-resistant and corrosion-resistant, so that it has an excellent suitability for the demanding application in vehicle brakes.
  • the force measurement is carried out in this thin-film sensor by a change in the electrical resistance and preferably in the layer normal. In this respect, the diamond-like sensor layer can be integrated directly into the power flow of the brake actuator.
  • the amorphous carbon layer forming the force sensor is preferably a diamond-like carbon layer known as a: CH, i-CH, Me: CH, DLC and Me: DLC.
  • the amorphous carbon layer can have graphitic structures with sp 2 hybridization in combination with diamond-like structures with sp 3 hybridization.
  • the layers may be provided with metallic and / or non-metallic doping elements. Such a layer is described in DE 199 54 164 A1. For this reason, reference is expressly made to the entire disclosure content of this document.
  • the production of the amorphous carbon layers which are used according to the invention can be carried out by means of conventional PVD and / or plasma CVD methods or by a combination of both methods.
  • Commercially available sputtering equipment or plasma CVD equipment can be used for this purpose.
  • the amorphous carbon layers according to the invention preferably have a hardness of approx. 20 GPa and are used in the thickness range of 1 to 10 microns.
  • a pressure component in the force sensor assembly according to the invention a pressure plate, cylinder, disk or ring is preferably used.
  • all component parts of a brake actuator which are in the force flow are suitable.
  • the temperature of the sensor and thus of the brake actuator can also be measured to increase the safety of the brake system.
  • the temperature measurement serves on the one hand to compensate the temperature characteristic of the force sensor but also to control and optimize the actuator control.
  • the temperature measurement with the aid of the amorphous carbon layer can be carried out in such a way that the resistance of the layer is measured at a location that is thermally equivalent but not in the force flow.
  • Conducted solutions can be used to connect the force and temperature measurement. These are z. B. the thin-film electrodes provided with a conductor track and a bonding pad and then connected in a known manner with a wire by bonding or soldering or gluing. The contact surfaces can be protected later by a potting compound.
  • Another embodiment of the invention consists in an integrated evaluation circuit by z. B. an ASIC or other microelectronic components are applied directly to the force sensor, ie to the amorphous carbon layer or a suitable component of the braking system which also carries the amorphous sensory coating.
  • the connection of the force sensor or local subdivision of the Sensor takes place with the aid of a thin-film circuit or in a known manner with wire bonding / soldering, gluing.
  • the invention further relates to the use of an amorphous carbon layer as a force sensor for vehicle brake systems, in particular electromechanical brake systems.
  • Figure 1 shows an embodiment in which the pressure member is in the form of a metal disc which acts as a dummy body within the brake actuator.
  • FIG. 2 shows an embodiment with a one-sided coating with the amorphous carbon layer and a backside electrical insulating coating.
  • FIGS. 3 and 4 show an embodiment in which the pressure component is made up of two disks with a central electrode.
  • FIGS 5, 6a and 6b show embodiments with simultaneous application of local temperature measurement electrodes.
  • Figure 1 shows an embodiment in which the pressure member is formed as a metal plate 1, wherein the metal plate 1 at the same time as a pressure body between two lying in the tension force flow actuator torbau kind 2 and 3 is used.
  • the metal disc 1, which serves as a pressure body is provided on both sides with an amorphous phen piezoresistive carbon layer 4 provided with a layer thickness of 4 microns.
  • the change in resistance of the layer is effected on the pressure plate 1 when the braking force acts measured.
  • FIG. 2 now shows an embodiment in which a one-sided coating of the pressure plate 1 with the force-sensitive amorphous carbon layer 4 and application of an electrically insulating coating 5 on the back are present.
  • known thick and thin film methods can be used, for.
  • plasma CVD layers of SiCON are also applicable or organic layers up to insulating lacquers. The measurement then likewise takes place against the mass, whereby only the change in resistance of the amorphous carbon layer 4 is evaluated.
  • two pressure plates 6, 7 are provided, which are provided on the mutually facing sides with an amorphous piezoresistive sensor layer 4.
  • a sheet-like electrode 8 (for example made of stainless steel, with a coating of Me-DLC, Ni, Cr or the like) is arranged between the pressure plates 6 and 7.
  • This Construction can also have recesses for the realization of non-force-loaded temperature sensors and electrical contacts as well as recesses for an electronic circuit. It is also part of the invention that the structure is hermetically sealed by suitable means. This can z. B. with a potting compound or an adhesive, known mechanical wrapping method and welding process done.
  • FIG. 4 shows a comparable embodiment with that according to FIG. 3, but this embodiment consists of two pressure plates 9 and 10, wherein the mutually facing sides of the pressure plates in a printing plate, namely in the printing plate with the reference numeral 9 with the amorphous piezoresistive carbon layer 4 is provided and the other pressure plate 10 with an insulator layer 5.
  • Figure 2 shows a comparable embodiment with that according to FIG. 3, but this embodiment consists of two pressure plates 9 and 10, wherein the mutually facing sides of the pressure plates in a printing plate, namely in the printing plate with the reference numeral 9 with the amorphous piezoresistive carbon layer 4 is provided and the other pressure plate 10 with an insulator layer 5.
  • a further advantageous embodiment of the invention is the ability to divide the amorphous piezoresistive carbon layer mechanically or geometrically so that local force-pressure measurements are possible.
  • FIGS. 5 and 6 show a sectional view of such an embodiment, wherein the pressure component 12 has surface profilings 13 which serve to receive the temperature sensor and / or the electronic circuit 14. This can z.
  • the support surface are divided by milling and / or structured thin-film electrodes are applied to the amorphous carbon layer.
  • 000450 the support surface are divided by milling and / or structured thin-film electrodes are applied to the amorphous carbon layer.
  • the amorphous carbon layer is denoted by 16.
  • the raised areas 16 are then used for force measurement.
  • the simultaneous measurement of the component temperature can also be realized in this embodiment.
  • FIGS. 6a and 6b also allow the construction of local force measuring cells and force sensory networks.
  • a pressure ring 18 is provided, which is provided with a piezoresistive sensor layer 19 and local electrode structures 21 on the surface.
  • the contact point was coated with copper and soldered a measuring wire.
  • the embodiment of Figure 6b consists of a pressure plate 22 with piezoresistive amorphous sensor layer 23 and circular electrode structures 24 on the surface for performing spatially resolved force measurement.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un dispositif dynamométrique pour traiter des signaux de pression dans des systèmes de freinage électroniques, notamment électromécaniques, en particulier dans des véhicules à moteur équipés d'au moins un ensemble capteur de force et d'au moins un dispositif de traitement de signaux par frein de roue. L'invention est caractérisée en ce qu'au moins un ensemble capteur de force comporte un actionneur de frein (2,3) en liaison de force avec au moins un élément de pression (1), lequel est doté au moins partiellement d'une couche de carbone (4) de type diamant piézorésistif amorphe formant un capteur de force.
EP06706305A 2005-01-19 2006-01-19 Dispositif dynamometrique sur des actionneurs de frein Withdrawn EP1842042A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005002523.4A DE102005002523B4 (de) 2005-01-19 2005-01-19 Vorrichtung zur Messung der Kraft bei Bremsaktuatoren
PCT/EP2006/000450 WO2006077115A1 (fr) 2005-01-19 2006-01-19 Dispositif dynamometrique sur des actionneurs de frein

Publications (1)

Publication Number Publication Date
EP1842042A1 true EP1842042A1 (fr) 2007-10-10

Family

ID=36177991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06706305A Withdrawn EP1842042A1 (fr) 2005-01-19 2006-01-19 Dispositif dynamometrique sur des actionneurs de frein

Country Status (7)

Country Link
US (1) US20080098826A1 (fr)
EP (1) EP1842042A1 (fr)
JP (1) JP2008527389A (fr)
KR (1) KR20070102518A (fr)
CN (1) CN101107502A (fr)
DE (1) DE102005002523B4 (fr)
WO (1) WO2006077115A1 (fr)

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DE102006019942B4 (de) * 2006-04-28 2016-01-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Kraftmessvorrichtung zur Messung der Kraft bei Festkörperaktoren, Verfahren zur Messung einer Kraft sowie Verwendung der Kraftmessvorrichtung
DE102011105756A1 (de) * 2011-01-28 2012-08-02 Kaufbeurer Mikrosysteme Wiedemann Gmbh Elektrische Messeinrichtung zur Kraft- und/oder Druckmessung
EP2522874A1 (fr) * 2011-05-13 2012-11-14 Inventio AG Entraînement d'ascenseur doté d'un frein
GB2520895B (en) * 2012-09-10 2017-09-20 Cameron Int Corp Electric actuator with a force / pressure measurement sensor
DE102015111425B4 (de) * 2014-07-18 2016-06-30 Klaus Kürschner Verfahren und Einrichtung zur elektrischen Kraftmessung mittels Isolationsdünnschicht
DE102014014509B3 (de) * 2014-10-06 2016-02-25 Günther Zimmer Reibgehemme mit Kraftmesseinrichtung
CN105865699B (zh) * 2016-06-03 2018-12-11 北方工业大学 一种检测无人机制动系统失衡的方法及装置
CN108407779A (zh) * 2018-03-28 2018-08-17 梁芳文 一种碟刹分组制动系统
US10744981B2 (en) 2018-06-06 2020-08-18 Sensata Technologies, Inc. Electromechanical braking connector
DE102018218300B4 (de) * 2018-10-25 2023-09-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Sensorisches Schichtsystem
DE102018131022A1 (de) * 2018-12-05 2020-06-10 Schaeffler Technologies AG & Co. KG Gleitlager und Verfahren zur Herstellung eines Lagerelementes für ein Gleitlager
EP3715661B1 (fr) * 2019-03-26 2022-06-01 Trelleborg Sealing Solutions Kalmar AB Cale anti-grincement améliorée
KR20240044831A (ko) 2022-09-29 2024-04-05 대양전기공업 주식회사 힘 센서 조립체 및 이에 장착되는 다이어프램
KR20240064093A (ko) 2022-11-04 2024-05-13 대양전기공업 주식회사 힘 센서 조립체의 제조 방법 및 이를 이용해 제조된 힘 센서 조립체

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Also Published As

Publication number Publication date
DE102005002523B4 (de) 2015-11-19
US20080098826A1 (en) 2008-05-01
JP2008527389A (ja) 2008-07-24
CN101107502A (zh) 2008-01-16
WO2006077115A1 (fr) 2006-07-27
KR20070102518A (ko) 2007-10-18
DE102005002523A1 (de) 2006-07-27

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