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DE4107847C1 - Impulse sensor using Wiegand effect - has winding connected to single pole switch for short circuiting winding when physical quantity e.g. temp., pressure, acceleration etc. changes - Google Patents

Impulse sensor using Wiegand effect - has winding connected to single pole switch for short circuiting winding when physical quantity e.g. temp., pressure, acceleration etc. changes

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Publication number
DE4107847C1
DE4107847C1 DE19914107847 DE4107847A DE4107847C1 DE 4107847 C1 DE4107847 C1 DE 4107847C1 DE 19914107847 DE19914107847 DE 19914107847 DE 4107847 A DE4107847 A DE 4107847A DE 4107847 C1 DE4107847 C1 DE 4107847C1
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DE
Germany
Prior art keywords
pulse wire
winding
switch
pulse
sensor according
Prior art date
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Expired - Lifetime
Application number
DE19914107847
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German (de)
Inventor
Burkhard Dipl.-Ing. 7997 Immenstaad De Voigt
Walter Dipl.-Ing. 7990 Friedrichshafen De Ulke
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Mercedes Benz Group AG
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Mercedes Benz AG
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Priority to DE19914107847 priority Critical patent/DE4107847C1/en
Application granted granted Critical
Publication of DE4107847C1 publication Critical patent/DE4107847C1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/4815—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals using a pulse wire sensor, e.g. Wiegand wire
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/9515—Proximity switches using a magnetic detector using non-linear magnetic devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The pulse wire sensor of Wiegand sensor (1) consists of a fixed transmitting head (2) with two permanent magnets (2.1,2.2) differently polarised and having a detecting coil (2.3) between them. The ends of the coil can be connected to an electronic evaluating unit (5). Spatially separated from the head and capable of being moved past it, there is the pulse wire (3), with its longitudinal axis parallel to that of the transmitting head unit. The former has a soft magnetic core (3.01) in a hard magnetic tube (3.02) and it possesses a winding (3.1), with its leads (3.1.1,3.1.2) going to a single pole switch (4) by means of which the coil can be shortcircuited, if the magnitude, for instance, of a physical quantity increases on the lever arm (4.1). USE/ADVANTAGE - Esp. for monitoring vehicle tyre pressure, also for measurement of rotational speed, sensing angles, contactless switches, flow measurement, card readers, etc. Position of switch is determined contactlessly.

Description

Die Erfindung betrifft einen Impulsdraht-Sensor gemäß dem Oberbegriff des Anspruches 1.The invention relates to a pulse wire sensor according to the Preamble of claim 1.

Ein derartiger Impulsdraht-Sensor ist bekannt (DE-Z: messen + prüfen/automatik, Mai 1984, Seiten 236-239, insb. Seite 238, Bild 7).Such a pulse wire sensor is known (DE-Z: measure + check / automatic, May 1984, pages 236-239, esp. page 238, Image 7).

Ferner ist die physikalische Funktionsweise derartiger Impulsdraht- Sensoren nach dem "Wiegand"-Effekt bekannt (DE-OS 21 43 326; DE-Z: FUNKSCHAU, 1980, Heft 8, Seite 78-80; DE-Z: ELEKTRONIK; 1980, Heft 7, Seiten 43-50; DE-Z: FUNKSCHAU, 1982, Heft 26, Seiten 46-49), ebenso hieraus deren Anwendung zur Drehzahlmessung, als Winkelschrittgeber, als kontaktloser und prellfreier Schalter, als Durchflußmesser, als Codekartenleser etc.Furthermore, the physical functioning of such pulse wire Known sensors according to the "Wiegand" effect (DE-OS 21 43 326; DE-Z: FUNKSCHAU, 1980, Issue 8, pages 78-80; DE-Z: ELECTRONICS; 1980, issue 7, pages 43-50; DE-Z: FUNKSCHAU, 1982, issue 26, pages 46-49), as well as their application for speed measurement, as an angle encoder, as a contactless and bounce-free switch, as a flow meter, as a code card reader Etc.

Im wesentlichen sind hierbei die Impulsdraht-Sensoren entweder nach Bild 7 oder nach Bild 4 der DE-Z: messen + prüfen/automatik, Mai 1984, Seiten 236-239, ausgebildet, wobei nach Bild 4 die Detektorspule unmittelbar auf dem Impulsdraht angeordnet ist, während die relativ zu diesem bewegbaren Permanentmagnete keine Spule aufweisen.Essentially, the pulse wire sensors are either designed according to Figure 7 or according to Figure 4 of DE-Z: measure + check / automatic, May 1984, pages 236-239, whereby according to Figure 4 the detector coil is arranged directly on the pulse wire, while the permanent magnets movable relative to this have no coil.

Aufgabe der Erfindung ist es, einen gattungsgemäßen Impulsdraht- Sensor so auszubilden, daß mit diesem auch der Zustand eines Schalters in einem beweglichen Teil kontaktlos und berührungslos erkannt werden kann.The object of the invention is to provide a generic pulse wire Train the sensor so that the state of the sensor  of a switch in a moving part contactless and contactless can be recognized.

Diese Aufgabe wird bei einem gattungsgemäßen Impulsdraht-Sensor mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst.This task is performed with a generic pulse wire sensor solved with the characterizing features of claim 1.

Zwar sind bereits sogenannte Reifendruckkontrollsysteme bekannt, bei welchen mit einem LC-Schwingkreis der Zustand eines in der Randfelge eingebauten Membranschalter erkannt werden kann (DE 33 10 052 C2) oder der Luftdruck in einer Radfelge mittels eines als Wiegand-Modul ausgebildeten Sensorelementes festgestellt werden kann (DE 32 09 660 A1), jedoch wird durch diese bekannten Sensoren die Erfindung nicht nahegelegt, insbesondere insofern nicht, als der erfindungsgemäß ausgebildete Impulsdraht-Sensor ein neues Anwendungsgebiet hinsichtlich der kontaktlosen Erkennung einer Änderung einer physikalischen Größe erschließt.So-called tire pressure control systems are already known, in which with an LC resonant circuit the state of a membrane switches installed in the rim are recognized can (DE 33 10 052 C2) or the air pressure in a wheel rim by means of a sensor element designed as a Wiegand module can be determined (DE 32 09 660 A1), but is by these known sensors do not suggest the invention, in particular not insofar as the one designed according to the invention Pulse wire sensor a new application in terms of contactless detection of a change in a physical Size opens up.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in folgendem näher beschrieben.An embodiment of the invention is in the drawing shown and is described in more detail below.

Der in der Figur dargestellte Impulsdraht-Sensor 1 besteht aus einem feststehenden Geberkopf 2 in einem Kunststoffgehäuse und dem gegenüber dem Geberkopf beweglichen Impulsdraht 3.The pulse wire sensor 1 shown in the figure consists of a fixed sensor head 2 in a plastic housing and the pulse wire 3 movable relative to the sensor head.

Der Geberkopf 2 weist zwei unterschiedlich gepolte, gleich starke Permanentstabmagnete 2.1 und 2.2 sowie zwischen diesen eine Detektorspule 2.3 mit einem weichmagnetischen Kern 2.3.0 auf, deren Längsachsen zueinander parallel verlaufen. Die Spulenanschlüsse 2.3.1, 2.3.2 der Detektorspule sind hierbei mit einer nicht im einzelnen dargestellten Auswerteelektronik 5 verbindbar. Unmittelbar benachbart zum und räumlich getrennt vom Geberkopf 2 ist der Impulsdraht 3 ("Wiegand"-Draht) vorbeibewegbar, beispielsweise rotatorisch oder translatorisch, dessen Längsachse parallel zu den Längsachsen der Geberkopfbauteile verläuft und welcher eine Wicklung 3.1 trägt, deren Anschlüsse 3.1.1 und 3.1.2 an einen einpoligen Schalter 4 geführt sind, durch welchen die Wicklung 3.1 kurzgeschlossen werden kann.The encoder head 2 has two differently polarized, equally strong permanent bar magnets 2.1 and 2.2 and between them a detector coil 2.3 with a soft magnetic core 2.3.0 , the longitudinal axes of which run parallel to one another. The coil connections 2.3.1, 2.3.2 of the detector coil can be connected to an evaluation electronics 5, not shown in detail. Immediately adjacent to and spatially separated from the encoder head 2 , the impulse wire 3 ("Wiegand" wire) can be moved past, for example in a rotary or translational manner, the longitudinal axis of which runs parallel to the longitudinal axes of the encoder head components and which carries a winding 3.1 , the connections 3.1.1 and 3.1 of which .2 are guided to a single-pole switch 4 , through which the winding 3.1 can be short-circuited.

Wird nun bei geöffnetem Schalter 4 der Impulsdraht 3 am (Setz-)Permanentmagnet 2.1 des Geberkopfes 2 vorbeibewegt (Richtung v), so ändert sich aufgrund des externen Magnetfeldes des Permanentmagneten 2.1 die Magnetisierungsrichtung bzw. die Polarität des Feldes im weichmagnetischen Kern 3.0.1 des Impulsdrahtes 3 sehr schnell, sobald das externe Feld bezogen auf den Impulsdraht eine bestimmte Größe HSET erreicht. Die bisher - aufgrund der unterschiedlichen Polaritäten von weichmagnetischem Kern 3.0.1 und hartmagnetischem Mantel 3.0.2 des Impulsdrahtes 3 - innerhalb des Impulsdrahtes 3 verlaufenden Feldlinien schließen sich sodann vollkommen außerhalb des Impulsdrahtes. Diese schnelle Änderung des Impulsdraht-Magnetfeldes bewirkt in der Detektorspule 2.3 eine extrem schnelle Flußänderung, so daß in dieser ein Spannungsimpuls UW induziert wird gemäß Fig. 1a. Gelangt im weiteren Verlauf der Impulsdraht dann in das eine umgekehrte Polarität aufweisende externe Magnetfeld des (Rücksetz-)Permanentmagneten 2.2, klappt das Feld im weichmagnetischen Kern des Impulsdrahtes wieder in seine Ausgangslage zurück, sobald die Stärke des externen Feldes bezogen auf den Impulsdraht den Wert HRESET erreicht hat. Dieser Umklappvorgang und somit die Umkehrung der Magnetisierungsrichtung im Kern ist jedoch nicht so schnell wie beim Setzvorgang, so daß die Änderung des Impulsdraht-Magnetfeldes ebenso weniger schnell ist und in der Detektorspule 2.3 lediglich ein relativ kleiner Spannungsimpuls UW mit umgekehrtem Vorzeichen induziert wird gemäß Fig. 1b. If the pulse wire 3 is now moved past the (setting) permanent magnet 2.1 of the encoder head 2 with the switch 4 open (direction v), then the direction of magnetization or the polarity of the field in the soft magnetic core 3.0.1 of the changes due to the external magnetic field of the permanent magnet 2.1 Pulse wire 3 very quickly as soon as the external field reaches a certain size H SET related to the pulse wire. The field lines which previously ran within the pulse wire 3 due to the different polarities of the soft magnetic core 3.0.1 and the hard magnetic sheath 3.0.2 of the pulse wire 3 then close completely outside the pulse wire. This rapid change in the pulse-wire magnetic field causes an extremely rapid change of flux in the detection coil 2.3, so that in this, a voltage pulse U W is induced according to Fig. 1a. If the pulse wire then arrives in the reverse magnetic polarity of the (reset) permanent magnet 2.2 , the field in the soft magnetic core of the pulse wire folds back into its starting position as soon as the strength of the external field in relation to the pulse wire reaches the value H Has reached RESET . However, this flipping process and thus the reversal of the magnetization direction in the core is not as fast as in the setting process, so that the change in the pulse wire magnetic field is also less rapid and only a relatively small voltage pulse U W with the opposite sign is induced in the detector coil 2.3 according to FIG . 1b.

Wird nun aufgrund einer Änderung einer physikalischen Größe, welche auf den Schalter 4 einwirkt (Betätigungsgröße 4.1), der Schalter 4 bei einem vorgegebenen Schwellwert geschlossen, so wird durch diesen die auf dem Impulsdraht 3 angeordnete Wicklung 3.1 kurzgeschlossen. Bewegt sich nun der Impulsdraht 3 erneut am Permanentmagnet 2.1 des Geberkopfes 2 vorbei, so ändert sich aufgrund des externen Magnetfeldes des Permanentmagneten 2.1 die Magnetisierungsrichtung im weichmagnetischen Kern des Impulsdrahtes erneut, sobald das externe Feld bezogen auf den Impulsdraht die bestimmte Größe HSET erreicht. Beim Umklappen der Magnetisierungsrichtung und der hierdurch hervorgerufenen Änderung des magnetischen Flusses im Impulsdraht wird jedoch in dessen kurzgeschlossener Wicklung 3.1 eine Spannung (Strom) induziert, wobei der hierdurch erzeugte Magnetfluß des Wicklungsmagnetfeldes der Magnetflußänderung im Impulsdraht entgegenwirkt und somit den Umklappvorgang verlangsamt. Die zeitlich langsamere Änderung des Impulsdraht- Gesamtmagnetfeldes bewirkt in Folge auch in der Detektorspule 2.3 eine deutlich reduzierte Flußänderung, so daß in dieser lediglich noch ein Spannungsimpuls UW mit geringer Amplitude gemäß Fig. 1c induziert wird. Der weitere Verlauf gestaltet sich wie zuvor im Fall "Schalter geöffnet" beschrieben.If, due to a change in a physical variable which acts on the switch 4 (actuating variable 4.1 ), the switch 4 is closed at a predetermined threshold value, the winding 3.1 arranged on the pulse wire 3 is short-circuited by it. If the pulse wire 3 now moves past the permanent magnet 2.1 of the encoder head 2 again, the direction of magnetization in the soft magnetic core of the pulse wire changes again as a result of the external magnetic field of the permanent magnet 2.1 as soon as the external field in relation to the pulse wire reaches the specific size H SET . When the direction of magnetization is reversed and the change in the magnetic flux in the pulse wire caused thereby, however, a voltage (current) is induced in its short-circuited winding 3.1 , the magnetic flux of the winding magnetic field thus generated counteracting the magnetic flux change in the impulse wire and thus slowing down the flipping process. The slower time change in the total magnetic field causes Impulsdraht- resulted in the detection coil 2.3, a significantly reduced flux change is induced so that in this still only a voltage pulse U W of low amplitude as shown in FIG. 1c. The rest of the course is as previously described in the "switch open" case.

Da an den Ausgangsanschlüssen 2.3.1, 2.3.2 des Geberkopfes 2 im Fall "Schalter 4 geöffnet" ein Spannungsimpuls UW großer Amplitude und im Fall "Schalter 4 geschlossen" ein Spannungsimpuls UW kleiner Amplitude anliegt, kann in einer nachgeschalteten Auswerteelektronik 5 der Schaltzustand des Schalters 4 eindeutig ausgewertet werden.Since a voltage pulse U W with a large amplitude is present at the output connections 2.3.1, 2.3.2 of the encoder head 2 in the case of "switch 4 open" and a voltage pulse U W with a small amplitude in the case of "switch 4 closed", the downstream evaluation electronics 5 can be used for the Switching status of switch 4 can be clearly evaluated.

Als Dimensionierungsangaben können folgende Werte gelten:The following values can be used as dimensioning information:

Impulsdraht 3:
  Durchmesser ca. 0,3-0,5 mm
  Länge ca. 15-20 mmImpulse wire 3 :
Diameter approx. 0.3-0.5 mm
Length approx. 15-20 mm

Wicklung 3.1:
  Windungszahl ca. 1500-3000Winding 3.1 :
Number of turns approx. 1500-3000

Detektorspule:
  Länge ca. 15 mm
  Windungszahl ca. 1500-3000Detector coil:
Length about 15 mm
Number of turns approx. 1500-3000

Permanentmagnete:
  Feldstärke ca. 100-120 A/cm
  Abstand ca. 13-20 mmPermanent magnets:
Field strength approx. 100-120 A / cm
Distance approx. 13-20 mm

Luftspalt zwischen Geberkopf und Impulsdraht: ca. 0,5-15 mm. Bei einem Abstand von ca. 10 mm zwischen dem Impulsdraht und der Detektorspule erhält manAir gap between encoder head and pulse wire: approx. 0.5-15 mm. At a distance of approx. 10 mm between the pulse wire and the detector coil is obtained

Spannungsimpulse UW:
  ca. 50 mV (während ca. 20 µs)
  ca. 10 mV (während ca. 20 µs)Voltage pulses U W :
approx. 50 mV (during approx. 20 µs)
approx. 10 mV (during approx. 20 µs)

Wird nun beispielsweise wie in Fig. 2 schematisch gezeigt, der Geberkopf 2 in eine Radaufhängung 6 und der Impulsdraht 3 mit Wicklung 3.1 und Schalter 4 in ein Fahrzeugrad 7 derart eingebaut, daß der in diesem Anwendungsfall als Druckschalter ausgebildete Schalter 4 vom Reifendruck p beaufschlagt ist, so ist ersichtlich, daß mit einem derartigen Impulsdraht-Sensor der Reifendruck kontaktlos und berührungslos überwacht werden kann, da ein Druckabfall (= Änderung der physikalischen Größe) ein Schließen des Schalters 4 zur Folge hat.If, for example, as shown schematically in FIG. 2, the encoder head 2 is installed in a wheel suspension 6 and the pulse wire 3 with winding 3.1 and switch 4 in a vehicle wheel 7 in such a way that the switch 4 designed as a pressure switch in this application is acted upon by the tire pressure p , it can be seen that with such a pulse wire sensor the tire pressure can be monitored contactlessly and contactlessly since a drop in pressure (= change in the physical quantity) results in the switch 4 being closed.

Claims (8)

1. Impulsdraht-Sensor, bestehend aus einem fest zuzuordnenden Geberkopf mit zwei unterschiedlich gepolten Permanentmagenten, zwischen denen sich eine Detektorspule befindet, deren Spulenanschlüsse mit einer Auswerteelektrode verbindbar sind, und einem vom Geberkopf räumlich getrennt anzuordnenden und an diesem vorbeibewegbaren Impulsdraht, dessen Längsachse parallel zu den Längsachsen der Geberkopfbauteile verläuft, dadurch gekennzeichnet, daß auf dem Impulsdraht (3) eine Wicklung (3.1) angeordnet ist, deren Anschlüsse (3.1.1, 3.1.2) an einen einpoligen Schalter (4) geführt sind, durch welchen die Wicklung kurzschließbar ist.1. Impulse wire sensor, consisting of a permanently assignable sensor head with two differently polarized permanent magnets, between which there is a detector coil, the coil connections of which can be connected to an evaluation electrode, and a pulse wire that can be spatially separated and moved past the sensor, whose longitudinal axis is parallel to it the longitudinal axes of the encoder head components, characterized in that a winding ( 3.1 ) is arranged on the pulse wire ( 3 ), the connections ( 3.1.1, 3.1.2 ) of which are led to a single-pole switch ( 4 ) through which the winding can be short-circuited is. 2. Impulsdraht-Sensor nach Anspruch 1, dadurch gekennzeichnet, daß durch den Kurzschluß der Wicklung (3.1) die Änderung des resultierenden Magnetfeldes des Impulsdrahtes (3) verlangsamt wird. 2. pulse wire sensor according to claim 1, characterized in that the change in the resulting magnetic field of the pulse wire ( 3 ) is slowed down by the short circuit of the winding ( 3.1 ). 3. Impulsdraht-Sensor nach Anspruch 2, dadurch gekennzeichnet, daß die Änderung des resultierenden Magnetfeldes durch die Detektorspule (2.3) erfaßt wird.3. pulse wire sensor according to claim 2, characterized in that the change in the resulting magnetic field is detected by the detector coil ( 2.3 ). 4. Impulsdraht-Sensor nach Anspruch 1, dadurch gekennzeichnet, daß die Permanentmagnete (2.1, 2.2) des Geberkopfes (2) gleich stark sind.4. pulse wire sensor according to claim 1, characterized in that the permanent magnets ( 2.1, 2.2 ) of the encoder head ( 2 ) are of equal strength. 5. Impulsdraht-Sensor nach Anspruch 1, dadurch gekennzeichnet, daß die Detektorspule (2.3) einen weichmagnetischen Kern (2.3.0) besitzt.5. pulse wire sensor according to claim 1, characterized in that the detector coil ( 2.3 ) has a soft magnetic core ( 2.3.0 ). 6. Impulsdraht-Sensor nach Anspruch 1, dadurch gekennzeichnet, daß Kern (3.0.1) und Mantel (3.0.2) des Impulsdrahtes (3) unterschiedliche Polarität besitzen.6. pulse wire sensor according to claim 1, characterized in that the core ( 3.0.1 ) and sheath ( 3.0.2 ) of the pulse wire ( 3 ) have different polarities. 7. Impulsdraht-Sensor nach Anspruch 1, dadurch gekennzeichnet, daß der Schalter (4) aufgrund einer Änderung einer physikalischen Größe, z. B. Temperatur, Druck, Beschleunigung etc., betätigt (4.1) wird.7. pulse wire sensor according to claim 1, characterized in that the switch ( 4 ) due to a change in a physical variable, for. B. temperature, pressure, acceleration etc., is actuated ( 4.1 ). 8. Impulsdraht-Sensor nach einem der Ansprüche, dadurch gekennzeichnet, daß der Geberkopf (2) in eine Radaufhängung (6) und der Impulsdraht (3) mit Wicklung (3.1) und Schalter (4) in einem Fahrzeugrad (7) eingebaut ist und der Schalter (4) vom Reifendruck (P) beaufschlagt ist.8. pulse wire sensor according to one of claims, characterized in that the encoder head ( 2 ) in a wheel suspension ( 6 ) and the pulse wire ( 3 ) with winding ( 3.1 ) and switch ( 4 ) is installed in a vehicle wheel ( 7 ) and the switch ( 4 ) is pressurized by the tire pressure (P).
DE19914107847 1991-03-12 1991-03-12 Impulse sensor using Wiegand effect - has winding connected to single pole switch for short circuiting winding when physical quantity e.g. temp., pressure, acceleration etc. changes Expired - Lifetime DE4107847C1 (en)

Priority Applications (1)

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DE19914107847 DE4107847C1 (en) 1991-03-12 1991-03-12 Impulse sensor using Wiegand effect - has winding connected to single pole switch for short circuiting winding when physical quantity e.g. temp., pressure, acceleration etc. changes

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DE19914107847 DE4107847C1 (en) 1991-03-12 1991-03-12 Impulse sensor using Wiegand effect - has winding connected to single pole switch for short circuiting winding when physical quantity e.g. temp., pressure, acceleration etc. changes

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704867C1 (en) * 1996-02-15 1998-08-13 Kostal Leopold Gmbh & Co Kg Drive arrangement for positioning element of motor vehicle air ventilation flaps
DE19925884A1 (en) * 1999-06-07 2000-12-21 Tyco Electronics Logistics Ag Bipolar magnetic field direction sensor is able to produce an auxiliary magnetic field simultaneously with a switch in external magnetic field direction and has a feedback element to ensure that field generation is simultaneous
DE10259223B3 (en) * 2002-11-20 2004-02-12 Mehnert, Walter, Dr. Position detector registering rotary- or linear motion, includes excitation magnet, ferromagnetic component, coil and sensor
DE102004013022B3 (en) * 2004-03-16 2005-10-13 Sew-Eurodrive Gmbh & Co. Kg Electric motor has section counter, which features a stationary and a moving part for a stable drive
DE102007039051A1 (en) 2007-08-17 2009-02-26 Mehnert, Walter, Dr. Absolute fine resolution segment or revolution counter
DE102007039050A1 (en) 2007-08-17 2009-02-26 Mehnert, Walter, Dr. Linear segment or revolution counter with a ferromagnetic element
US7598733B2 (en) 2002-11-20 2009-10-06 Walter Mehnert Position detector
CN108936942A (en) * 2018-06-11 2018-12-07 广州博鳌健康产业研究院（有限合伙） A kind of pressure sensing method and device for intelligent shoe
EP4257929A1 (en) 2022-04-06 2023-10-11 RVmagnetics, a.s. Physical quantity measurement system and/or position measurement with bistable magnetic wire, method of measurement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008561C2 (en) * 1980-03-06 1981-11-26 Fa. Dr. Eugen Dürrwächter DODUCO, 7530 Pforzheim Contactless switch
DE3209660A1 (en) * 1982-03-17 1983-10-06 Heinz Dieter Dipl Sonnleitner Air-pressure indicator for vehicle tyres

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008561C2 (en) * 1980-03-06 1981-11-26 Fa. Dr. Eugen Dürrwächter DODUCO, 7530 Pforzheim Contactless switch
DE3209660A1 (en) * 1982-03-17 1983-10-06 Heinz Dieter Dipl Sonnleitner Air-pressure indicator for vehicle tyres

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DANCE, B.: Der Wiegand-Effekt, IN: Funkschau 1980, H. 8, S. 78-80 *
HEINTZ, F.: Sensoren im Kraftfahrzeug, IN: Funkschau 26/1982, S. 46-49 *
KUERS, G. et al.: Ein alternativer magnetischer Sensor: Der Wiegand-Modul, IN: Elektronik 1980, H. 7, S. 43-50 *
WROBEL, M.: Eigenschaften des Wiegand-Sensors, IN: messen + prüfen/automatik, Mai 1984, S. 236-239 *

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* Cited by examiner, † Cited by third party
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DE19704867C1 (en) * 1996-02-15 1998-08-13 Kostal Leopold Gmbh & Co Kg Drive arrangement for positioning element of motor vehicle air ventilation flaps
DE19925884A1 (en) * 1999-06-07 2000-12-21 Tyco Electronics Logistics Ag Bipolar magnetic field direction sensor is able to produce an auxiliary magnetic field simultaneously with a switch in external magnetic field direction and has a feedback element to ensure that field generation is simultaneous
DE19925884C2 (en) * 1999-06-07 2001-09-20 Tyco Electronics Logistics Ag Magnetic field sensor and its use
US7598733B2 (en) 2002-11-20 2009-10-06 Walter Mehnert Position detector
DE10259223B3 (en) * 2002-11-20 2004-02-12 Mehnert, Walter, Dr. Position detector registering rotary- or linear motion, includes excitation magnet, ferromagnetic component, coil and sensor
DE102004013022B3 (en) * 2004-03-16 2005-10-13 Sew-Eurodrive Gmbh & Co. Kg Electric motor has section counter, which features a stationary and a moving part for a stable drive
US8655615B2 (en) 2007-08-17 2014-02-18 Walter Mehnert Absolute high resolution segment or revolution counter
DE102007039050A1 (en) 2007-08-17 2009-02-26 Mehnert, Walter, Dr. Linear segment or revolution counter with a ferromagnetic element
DE102007039051A1 (en) 2007-08-17 2009-02-26 Mehnert, Walter, Dr. Absolute fine resolution segment or revolution counter
US8766625B2 (en) 2007-08-17 2014-07-01 Walter Mehnert Linear segment or revolution counter with a ferromagnetic element
US9200925B2 (en) 2007-08-17 2015-12-01 Walter Mehnert Absolute high resolution segment or revolution counter
DE102007039051B4 (en) 2007-08-17 2023-05-17 Avago Technologies International Sales Pte. Limited Absolute fine-resolution segment or revolution counter
DE102007039050B4 (en) 2007-08-17 2023-08-31 Avago Technologies International Sales Pte. Limited Linear segment or revolution counter with a ferromagnetic element
DE102007039051B8 (en) 2007-08-17 2023-09-28 Avago Technologies International Sales Pte. Limited Absolute fine-resolution segment or revolution counter
DE102007039050B8 (en) 2007-08-17 2024-02-15 Avago Technologies International Sales Pte. Limited Linear segment or revolution counter with a ferromagnetic element
CN108936942A (en) * 2018-06-11 2018-12-07 广州博鳌健康产业研究院（有限合伙） A kind of pressure sensing method and device for intelligent shoe
CN108936942B (en) * 2018-06-11 2020-09-11 广州博鳌健康产业研究院（有限合伙） Pressure sensing method and device for intelligent shoe
EP4257929A1 (en) 2022-04-06 2023-10-11 RVmagnetics, a.s. Physical quantity measurement system and/or position measurement with bistable magnetic wire, method of measurement
WO2023194852A1 (en) 2022-04-06 2023-10-12 Rvmagnetics, A.S. Physical quantity measurement system and/or for position measurement with bistable magnetic wire, method of measurement

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