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DE19622545A1 - Movement measuring device - Google Patents

Movement measuring device

Info

Publication number
DE19622545A1
DE19622545A1 DE1996122545 DE19622545A DE19622545A1 DE 19622545 A1 DE19622545 A1 DE 19622545A1 DE 1996122545 DE1996122545 DE 1996122545 DE 19622545 A DE19622545 A DE 19622545A DE 19622545 A1 DE19622545 A1 DE 19622545A1
Authority
DE
Germany
Prior art keywords
movement
sensor
component
sensors
elements
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Withdrawn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
DE1996122545
Other languages
German (de)
Inventor
Andreas Winckler
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.)
ITT Automotive Europe GmbH
Continental Teves AG and Co oHG
Original Assignee
ITT Automotive Europe GmbH
Alfred Teves GmbH
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 ITT Automotive Europe GmbH, Alfred Teves GmbH filed Critical ITT Automotive Europe GmbH
Priority to DE1996122545 priority Critical patent/DE19622545A1/en
Publication of DE19622545A1 publication Critical patent/DE19622545A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • 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
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2451—Incremental encoders
    • 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
    • F16D2066/003—Position, angle or speed
    • 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
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The appliance has magnetic field sensors (8,9) on one component (4), which sense the change in the magnetic field of the magnetic generators (6) arranged at regular intervals (a) on a moving component (3) in the direction of movement. The magnetic generators can be rings located round the moving component, which can be at right angles to the direction of movement, with a cross section which reduces the air gap between generator and sensor. The sensors can be positioned so that they are displaced from one another in the direction of movement, and provide phase displaced output signals

Description

Die Erfindung betrifft eine Vorrichtung zum Messen der Bewe­ gung eines relativ zu einem anderen Bauteil bewegbaren Bau­ teils.The invention relates to a device for measuring the movement supply of a structure that can be moved relative to another component part.

Bei den bekannten Vorrichtungen wird es als nachteilig ange­ sehen, daß diese lediglich einen eingeschränkten Meßbereich aufweisen. Der Meßbereich erstreckt sich regelmäßig in nur eine Koordinatenrichtung und eine Bewegung des zu sensieren­ den Bauteiles in eine andere Koordinatenrichtung, beispiels­ weise um dessen eigene Achse, muß vermieden werden.In the known devices, it is considered disadvantageous see that this is only a limited measuring range exhibit. The measuring range extends regularly in only to sense a coordinate direction and a movement of the the component in a different coordinate direction, for example wise around its own axis must be avoided.

Aufgabe der vorliegenden Erfindung ist es, eine verbesserte Vorrichtung bereitzustellen, welche bei hoher Genauigkeit einen beliebig großen Meßbereich aufweist und darüber hinaus eine Bewegung des zu sensierenden Bauteils in andere Koordi­ natenrichtungen zuläßt.The object of the present invention is an improved To provide device which with high accuracy has an arbitrarily large measuring range and beyond a movement of the component to be sensed into other coordinates allows national directions.

Diese Aufgabe wird gelöst mit den kennzeichnenden Merkmalen des Patentanspruchs 1.This problem is solved with the characteristic features of claim 1.

Besonders vorteilhaft ist, daß durch die Verwendung magne­ tisch wirksamer Geberelemente ein berührungsfreier und ver­ schleißarmer Betrieb der Vorrichtung zum Messen gewährlei­ stet ist. It is particularly advantageous that the use of magne table effective encoder elements a non-contact and ver Low-wear operation of the measuring device guarantee is steady.  

Die Erfindung wird nachstehend anhand eines Ausführungsbei­ spieles, das in der Zeichnung dargestellt ist, näher be­ schrieben.The invention is illustrated below by means of an embodiment game, which is shown in the drawing, be closer wrote.

Es zeigt:It shows:

Fig. 1 Prinzipskizze einer Meßvorrichtung nach der Erfin­ dung; Fig. 1 schematic diagram of a measuring device according to the inven tion;

Fig. 2 ein schematisches Schaltbild nach der Erfindung; Fig. 2 is a schematic circuit diagram according to the invention;

Fig. 3 schematische Darstellung der Signalverläufe. Fig. 3 shows a schematic representation of the signal curves.

Gemäß Fig. 1 umfaßt eine Vorrichtung zum Messen 1 ein in Bewegungsrichtung 2 bewegbares Bauteil 3 sowie ein vorzugs­ weise ortsfest dazu angeordnetes, anderes Bauteil 4. Das zu sensierende Bauteil 3 ist gemäß dem dargestellten Ausfüh­ rungsbeispiel um seine eigene Achse 5 drehbar. Dies führt zu einer besonders kostengünstigen und montagefreundlichen Bau­ weise, weil eine Verdrehsicherung nicht notwendig ist. Die Achse 5 erstreckt sich parallel zur Bewegungsrichtung 2.Referring to FIG. 1, an apparatus 1 for measuring comprises a movable member 2 in the direction of movement 3 along with a preference as to fixedly disposed, another component 4. The component 3 to be sensed can be rotated about its own axis 5 according to the exemplary embodiment shown. This leads to a particularly inexpensive and easy-to-install construction, because an anti-rotation device is not necessary. The axis 5 extends parallel to the direction of movement 2 .

Das Bauteil 3 verfügt über gleichartige, magnetisch wirksame Geberelemente 6, die in Bewegungsrichtung 2 regelmäßige Ab­ stände a zueinander aufweisen und die Breite d besitzen. Die Geberelemente 6 sind ringförmig sowie am Umfang 7 des Bauteiles 3 angeordnet und weisen stufenartig, senkrecht zur Bewegungsrichtung 2, nach radial außen. Bei fluchtender Lage eines Geberelementes 6 mit dem Sensor 8,9 führt der Quer­ schnitt der Geberelemente 6 zu einer Veringerung des Luft­ spaltes, was zu einem höheren magnetischen Fluß im Sensor 8, 9 führt. Allerdings sind ganz grundsätzlich auch Geber­ elemente 6 denkbar, welche mit dem Umfang 7 des Bauteiles 3 fluchtend abschließen. Jedes Geberelement 6 besteht aus weichmagnetischem Werkstoff, und ist beispielsweise als Ei­ senring ausgebildet.The component 3 has the same type, magnetically active transmitter elements 6 , which have regular distances a to each other in the direction of movement 2 and have the width d. The encoder elements 6 are arranged in a ring and on the circumference 7 of the component 3 and point radially outwards in a step-like manner, perpendicular to the direction of movement 2 . In the aligned position of a sensor element 6 with the sensor 8.9 , the cross section of the sensor elements 6 leads to a reduction in the air gap, which leads to a higher magnetic flux in the sensor 8 , 9 . However, in principle, donor elements 6 are also conceivable, which are flush with the circumference 7 of the component 3 . Each encoder element 6 consists of soft magnetic material, and is designed for example as an egg senring.

An dem anderen Bauteil 4 ist zumindest ein Sensor 8 angeord­ net, welcher wie vorstehend erläutert wurde, dazu dient, Magnetfeldänderungen zu sensiert, die durch vorbeibewegte Geberelemente 6 verursacht werden. Gemäß dem dargestellten Ausführungsbeispiel ist ein zusätzlicher, in Bewegungsrich­ tung 2 versetzt zu dem ersten Sensor 8 angeordneter zweiter Sensor 9 vorgesehen. Der Versatz b und auch die Breite d ist abhängig von dem verwendeten Sensortyp und dem gewünschten Phasenverhältnis der Ausgangssignale. Zweckmäßigerweise wird der Versatz b so eingestellt, daß eine Phasenverschiebung der Ausgangssignale 10, 11 von 90° eintritt. Dies wird er­ reicht, wenn a + b = 2 * b ist (b ungleich d). Der Versatz b liegt üblicherweise bei etwa 1,5 mm. Die Sensoren 8, 9 sind beispielsweise auf einem Dauermagneten montiert und signali­ sieren die Annäherung eines weichmagnetischen Bauteils oder eines Geberelementes 6 durch Änderung ihres analogen Aus­ gangssignales 10, 11. Als Sensoren 8, 9 können auch grundsätz­ lich bekannte Hall-Sensoren eingesetzt werden. Es ist an­ zumerken, daß eine rotatorische Bewegung des Bauteiles 3 keine Änderung der Ausgangssignale 10, 11 verursacht. Es be­ steht aber die Möglichkeit, eine zusätzliche Einrichtung zur Drehwegerfassung vorzusehen. Ebenso besteht die Möglichkeit, die beschriebene Vorrichtung derart abzuwandeln, daß eine Drehwegerfassung möglich ist. Dies kann insbesondere ermög­ licht werden durch Anordnung der Sensoren 8, 9 bzw. der Ge­ berelemente 6 am Umfang der Bauteile 3, 4.On the other component 4 , at least one sensor 8 is arranged, which, as explained above, serves to sense changes in the magnetic field caused by sensor elements 6 moving past. According to the illustrated embodiment, an additional, in the direction of movement 2 offset to the first sensor 8 arranged second sensor 9 is provided. The offset b and also the width d depend on the type of sensor used and the desired phase ratio of the output signals. The offset b is expediently set such that a phase shift of the output signals 10 , 11 of 90 ° occurs. This will be sufficient if a + b = 2 * b (b not equal to d). The offset b is usually about 1.5 mm. The sensors 8 , 9 are, for example, mounted on a permanent magnet and signali the approach of a soft magnetic component or a transmitter element 6 by changing their analog output signals 10 , 11th Known Hall sensors can also be used as sensors 8 , 9 . It should be noted that a rotational movement of the component 3 does not cause a change in the output signals 10 , 11 . However, there is the possibility of providing an additional device for detecting the rotational path. There is also the possibility of modifying the described device in such a way that a rotation path detection is possible. This can be made possible, in particular, by arranging the sensors 8 , 9 or the sensor elements 6 on the circumference of the components 3 , 4th

Die analogen Ausgangssignale 10, 11 der Sensoren 8,9 sind über dem Verschiebungsweg sinusförmig sowie periodisch und werden einem, in Fig. 2 prinzipiell gezeigten Schaltungs­ aufbau 12 zugeführt. Die gewonnenen Ausgangssignale 13, 14, 15 werden zur weiteren Verarbeitung abgetastet und mittels ei­ nes A/D-Wandlers 16 in Digitalsignale umgewandelt.The analog output signals 10 , 11 of the sensors 8, 9 are sinusoidal and periodic over the displacement path and are supplied to a circuit structure 12 shown in principle in FIG. 2. The output signals 13 , 14 , 15 obtained are sampled for further processing and converted into digital signals by means of an A / D converter 16 .

Ein prinzipieller Schaltungsaufbau 12 gemäß Fig. 2 umfaßt die Sensoren 8, 9, welche mit einer Versorgungsspannung Ub versorgt werden und mit einem Zweig 17 der Schaltung 12 ver­ bunden sind. Der Zweig 17 weist zwei in Serie geschaltete Widerstände R₃ und R₄ auf. Zwischen den Widerständen R₃ und R₄ befindet sich ein Abgriff für das Potential A, welches dem A/D-Wandler 16 zugeführt wird. Darüber hinaus wird der A/D- Wandler 16 noch mit dem Potential B des Sensors 8 und dem Potential C des Sensors 9 versorgt. Diese Signale werden mit Hilfe des A/D-Wandlers 16 und mit Hilfe von EDV weiterver­ arbeitet.A basic circuit configuration 12 according to FIG. 2 comprises the sensors 8 , 9 , which are supplied with a supply voltage U b and are connected to a branch 17 of the circuit 12 . The branch 17 has two resistors R₃ and R₄ connected in series. Between the resistors R₃ and R₄ there is a tap for the potential A, which is fed to the A / D converter 16 . In addition, the A / D converter 16 is still supplied with the potential B of the sensor 8 and the potential C of the sensor 9 . These signals are processed with the aid of the A / D converter 16 and with the aid of EDP.

Fig. 3 zeigt in einer Skizze die Auswertung periodischer Ausgangssignale 10, 11 zweier Sensoren 8,9. Das Signal 10 des ersten Sensors 8 ist sinusförmig und weist Wellenberge 18, 18′, 18′′ sowie Wellentäler 19, 19′, 19′′ sowie in jeder Peri­ ode zwei Nulldurchgänge 20, 21 auf. In einem Bereich c um jeden Nulldurchgang 20, 21 verläuft das Signal 10 annähernd linear und kann, wie nachstehend beschrieben, als Wegsignal weiterverarbeitet werden. Fig. 3 shows a sketch of the evaluation of periodic outputs 10, 11 of two sensors 8,9. The signal 10 of the first sensor 8 is sinusoidal and has wave crests 18 , 18 ', 18 ''and wave troughs 19 , 19 ', 19 '' and in each period two zero crossings 20 , 21 . In a region c around each zero crossing 20 , 21 , the signal 10 is approximately linear and, as described below, can be further processed as a path signal.

Der in Bewegungsrichtung verschobene zweite Sensor 9 liefert ein gegenüber dem ersten Signal 10 vorzugsweise um 90° pha­ senverschobenes Ausgangssignal 11. Das zweite Signal 11 um­ faßt ferner Wellenberge 22, Wellentäler 23 sowie Nulldurch­ gänge 24. Die beiden Ausgangssignale 10, 11 kreuzen sich in Kreuzungspunkten 25. Es versteht sich, daß ein Wellenberg 18, 18′, 18′′ der Ausgangssignale 10, 11 in der Meßvorrichtung einem, dem jeweiligen Sensor 8,9 gegenüberliegendes Geber­ element 6 entspricht, weil der zwischengeordnete Luftspalt dadurch minimal ist. Ein Wellental 19, 19′, 19′′ der Ausgangs­ signale 10, 11 entspricht dem auf Lücke stehen zweier Geber­ elemente 6 zu dem betreffenden Sensor 8,9, das heißt, der Sensor 8,9 liegt genau zwischen zwei Geberelementen 6. Jedes Wellental 19, 19′, 19′′ wird somit verursacht durch einen maxi­ malen Luftspalt.The second sensor 9 shifted in the direction of movement provides an output signal 11 which is preferably 90 ° out of phase with respect to the first signal 10 . The second signal 11 also summarizes wave crests 22 , troughs 23 and zero crossings 24th The two output signals 10 , 11 intersect at intersection points 25 . It is understood that a wave crest 18 , 18 ', 18 ''of the output signals 10 , 11 in the measuring device corresponds to one, the respective sensor 8.9 opposite sensor element 6 , because the intermediate air gap is thereby minimal. A wave trough 19 , 19 ', 19 ''of the output signals 10 , 11 corresponds to the gap between two encoder elements 6 to the relevant sensor 8.9 , that is, the sensor 8.9 is exactly between two encoder elements 6th Each trough 19 , 19 ', 19 ''is thus caused by a maxi paint air gap.

Zur Ermittlung des Ausmaßes der Bewegung dient im wesentli­ chen die Anzahl der Kreuzungspunkte 25 der beiden Ausgangs­ signale. Zwischen den Kreuzungspunkten 25 liefert immer ei­ ner der beiden Sensoren 8, 9 ein annähernd lineares Signal 10, 11. Die Verschiebung wird im Rahmen einer logischen Aus­ wertung dadurch ermittelt, daß die Anzahl der gezählten Kreuzungspunkte 25 mit der, dem linearen Arbeitsbereich der Sensoren 8, 9 entsprechenden, Wegstrecke multipliziert wird und der Meßweg des in der Nähe des Nulldurchganges 20, 21, 24 befindlichen Sensors 8, 9 hinzuaddiert wird.The number of crossing points 25 of the two output signals is used to determine the extent of the movement. Between the crossing points 25 always egg ner of the two sensors 8 , 9 delivers an approximately linear signal 10 , 11th The displacement is determined in the context of a logical evaluation by multiplying the number of intersection points 25 by the distance corresponding to the linear working range of the sensors 8 , 9 and the measuring path of the one near the zero crossing 20 , 21 , 24 Sensor 8 , 9 is added.

Die vorgestellte Vorrichtung eignet sich insbesonders zur Verwendung in einer KFZ-Bremsanlage zur Sensierung einer Kolbenbewegung, insbesondere der Bewegung eines Bremskolbens oder eines Tandem-Hauptbremszylinder-Kolbens.The device presented is particularly suitable for Use in a vehicle brake system to sense a Piston movement, in particular the movement of a brake piston or a tandem master cylinder piston.

Claims (8)

1. Vorrichtung zum Messen der Bewegung eines relativ zu einem anderen Bauteil (4) bewegbaren Bauteils (3), ge­ kennzeichnet durch am bewegbaren Bauteil (3) in Bewe­ gungsrichtung (2) in regelmäßigen Abständen( a ) zuein­ ander angeordnete, magnetisch wirksame Geberelemente (6) und zumindest einem, an dem anderen Bauteil (4) angeord­ neten, die Magnetfeldänderung sensierenden, Sensor (8, 9).1. A device for measuring the movement of a relative to another component ( 4 ) movable component ( 3 ), characterized by on the movable component ( 3 ) in the direction of movement ( 2 ) at regular intervals (a) to each other, arranged magnetically active sensor elements ( 6 ) and at least one sensor ( 8 , 9 ) arranged on the other component ( 4 ) and sensing the change in the magnetic field. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Geberelemente (6) ringförmig an dem bewegbaren Bau­ teil (3) angeordnet sind.2. Device according to claim 1, characterized in that the transmitter elements ( 6 ) are arranged in a ring on the movable construction part ( 3 ). 3. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Geberelemente (6) eine senkrecht zur Bewegungsrichtung (2) wirksame und einen den Luftspalt zwischen Geberelement (6) und Sensor (8,9) reduzierenden Querschnitt aufweist.3. Device according to one or more of the preceding claims, characterized in that the transmitter elements ( 6 ) has a cross section which is effective perpendicular to the direction of movement ( 2 ) and which has an air gap between the transmitter element ( 6 ) and sensor ( 8, 9 ). 4. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch zwei in Bewegungsrich­ tung (2) versetzt zueinander angeordnete, zueinander phasenverschobene Ausgangssignale (10, 11) liefernde Sen­ soren (8, 9).4. Device according to one or more of the preceding claims, characterized by two in the direction of movement ( 2 ) offset from one another, phase-shifted output signals ( 10 , 11 ) supplying sensors ( 8 , 9 ). 5. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Phasenver­ schiebung der Signale (10, 11) 90° beträgt.5. The device according to one or more of the preceding claims, characterized in that the phase shift of the signals ( 10 , 11 ) is 90 °. 6. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das zu sensieren­ de Wegstück dem Wert entspricht, der sich ergibt, wenn die Anzahl der Kreuzungspunkte (25) mit der dem linearen Arbeitsbereich der Sensoren entsprechenden Wegstrecke multipliziert wird und der Meßweg des in der Nähe des Nulldurchganges befindlichen Sensors (8,9) hinzuaddiert wird.6. Device according to one or more of the preceding claims, characterized in that the distance to be sensed corresponds to the value which results when the number of crossing points ( 25 ) is multiplied by the distance corresponding to the linear working range of the sensors and the measuring path of the sensor ( 8, 9 ) located near the zero crossing is added. 7. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Bildung des Wegsignals das Ausgangssignal (10, 11) dient, welches nahe am Nulldurchgang (20, 21, 24, 24′) liegt.7. The device according to one or more of the preceding claims, characterized in that the output signal ( 10 , 11 ) is used to form the path signal, which is close to the zero crossing ( 20 , 21 , 24 , 24 '). 8. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch deren Verwendung in ei­ ner Kraftfahrzeug-Bremsanlage zur Sensierung einer Kol­ benbewegung, insbesondere der Bewegung eines Bremskol­ bens oder eines Tandem-Hauptbremszylinder-Kolbens.8. Device according to one or more of the preceding Claims characterized by their use in egg ner motor vehicle brake system for sensing a Kol benbewegung, especially the movement of a brake piston bens or a tandem master cylinder piston.
DE1996122545 1996-06-05 1996-06-05 Movement measuring device Withdrawn DE19622545A1 (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002020323A1 (en) * 2000-09-05 2002-03-14 Continental Teves Ag & Co. Ohg Actuator for an electrohydraulic braking system
WO2002043996A1 (en) * 2000-11-29 2002-06-06 Lucas Automotive Gmbh Device for detecting positions and movements of a brake pedal for a vehicle brake system
EP1253057A1 (en) * 2001-04-26 2002-10-30 ROBERT BOSCH GmbH Device for detecting the activation of a braking system and its use
EP1254819A1 (en) * 2001-04-25 2002-11-06 Delphi Technologies, Inc. Brake master cylinder-sensor system and method
WO2004041616A1 (en) * 2002-11-04 2004-05-21 Lucas Automotive Gmbh Main cylinder arrangement for a motor vehicle braking system
WO2005056359A1 (en) * 2003-12-09 2005-06-23 Continental Teves Ag & Co. Ohg Method and device for controlling a motor vehicle comprising an electrically controlled braking system provided with a driver dynamic control
WO2005080162A1 (en) * 2003-10-15 2005-09-01 Honeywell International Inc. Electro-mechanical actuator braking apparatus and method using motor commutation sensor output to derive piston displacement
CN100398368C (en) * 2003-12-09 2008-07-02 大陆-特韦斯贸易合伙股份公司及两合公司 Method and device for controlling a motor vehicle comprising an electrically controlled braking system provided with a driver dynamic control
WO2012069068A1 (en) * 2010-11-26 2012-05-31 Haldex Brake Products Ab Brake monitoring device and components associated therewith
DE102016002823A1 (en) * 2016-03-05 2017-09-07 Wabco Gmbh Sensor device for a Kupplungszentralausrücker, Kupplungszentralausrücker and methods for operating the sensor device
CN110966328A (en) * 2020-01-02 2020-04-07 中车青岛四方车辆研究所有限公司 Real-time state monitoring device of brake clamp unit, brake clamp unit and method

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US6851767B2 (en) 2000-09-05 2005-02-08 Continental Teves Ag & Co., Ohg Actuator for an electrohydraulic braking system
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WO2005080162A1 (en) * 2003-10-15 2005-09-01 Honeywell International Inc. Electro-mechanical actuator braking apparatus and method using motor commutation sensor output to derive piston displacement
WO2005056359A1 (en) * 2003-12-09 2005-06-23 Continental Teves Ag & Co. Ohg Method and device for controlling a motor vehicle comprising an electrically controlled braking system provided with a driver dynamic control
CN100398368C (en) * 2003-12-09 2008-07-02 大陆-特韦斯贸易合伙股份公司及两合公司 Method and device for controlling a motor vehicle comprising an electrically controlled braking system provided with a driver dynamic control
US8392085B2 (en) 2003-12-09 2013-03-05 Continental Teves Ag & Co. Ohg Method and device for controlling a motor vehicle comprising an electronically controlled brake system with driving dynamics control
WO2012069068A1 (en) * 2010-11-26 2012-05-31 Haldex Brake Products Ab Brake monitoring device and components associated therewith
US20130255366A1 (en) * 2010-11-26 2013-10-03 Fredrik Seglo Brake Monitoring Device And Components Associated Therewith
DE102016002823A1 (en) * 2016-03-05 2017-09-07 Wabco Gmbh Sensor device for a Kupplungszentralausrücker, Kupplungszentralausrücker and methods for operating the sensor device
CN110966328A (en) * 2020-01-02 2020-04-07 中车青岛四方车辆研究所有限公司 Real-time state monitoring device of brake clamp unit, brake clamp unit and method

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