DE102005035799A1 - Contactless magnetic position sensor - Google Patents
Contactless magnetic position sensor Download PDFInfo
- Publication number
- DE102005035799A1 DE102005035799A1 DE200510035799 DE102005035799A DE102005035799A1 DE 102005035799 A1 DE102005035799 A1 DE 102005035799A1 DE 200510035799 DE200510035799 DE 200510035799 DE 102005035799 A DE102005035799 A DE 102005035799A DE 102005035799 A1 DE102005035799 A1 DE 102005035799A1
- Authority
- DE
- Germany
- Prior art keywords
- magnetic
- magnetic core
- position sensor
- detection
- coil
- 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.)
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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
- G01D5/20—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 by varying inductance, e.g. by a movable armature
- G01D5/2006—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 by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
- G01D5/2033—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 by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet
-
- 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
- G01D5/20—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 by varying inductance, e.g. by a movable armature
- G01D5/22—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 by varying inductance, e.g. by a movable armature differentially influencing two coils
- G01D5/2208—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 by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils
- G01D5/2241—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 by varying inductance, e.g. by a movable armature differentially influencing two coils by influencing the self-induction of the coils by controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Bei einem Magnetpositionssensor zum Detektieren der Position eines beweglichen Elements (2), das sich kontaktlos entlang eines Magnetkerns (3) bewegt, der durch wenigstens eine Erregerspule (4) magnetisiert ist, welche mit Wechselstrom versorgt wird, wobei das bewegliche Element aus einem Magneten ausgeführt ist, der einen virtuellen Luftspalt (7) in dem Magnetkern erzeugt und in Abhängigkeit seiner Position den Magnetstreufluß und folglich die Spannung beeinträchtigt, die durch wenigstens eine Detektionsspule (6) geliefert wird, welche mit dem Magnetkern gekoppelt ist, ist der Magnetkern (3) aus einem massiven Körper ausgeführt und weist ein kreisförmiges Querschnittsprofil auf.In a magnetic position sensor for detecting the position of a movable member (2) moving without contact along a magnetic core (3) magnetized by at least one excitation coil (4) supplied with alternating current, the movable member being made of a magnet is that creates a virtual air gap (7) in the magnetic core and, depending on its position, affects the magnetic flux leakage and consequently the voltage supplied by at least one detection coil (6) coupled to the magnetic core, the magnetic core (3) is made of a solid body and has a circular cross-sectional profile.
Description
Hintergrund der Erfindungbackground the invention
Die Erfindung betrifft das technische Gebiet der kontaktlosen Magnetsensoren, die es ermöglichen, die Linearposition eines beweglichen Elements im allgemeinen Sinne zu bestimmen. Solche Sensoren werden z.B. im Automobilbereich angewendet, um z.B. die Linearposition von Kupplung oder Schaltgabel eines Automatikgetriebes oder robotisierten Getriebes zu detektieren.The Invention relates to the technical field of contactless magnetic sensors, which make it possible the linear position of a movable element in the general sense to determine. Such sensors are e.g. applied in the automotive sector to e.g. the linear position of clutch or shift fork of an automatic transmission or robotized gearbox.
Aus
dem Stand der Technik sind zahlreiche Ausführungsformen von kontaktlosen
Magnet-Positionssensoren bekannt. So wird z.B. in der
Das bewegliche Element, das durch einen Permanent-Magneten ausgeführt wird, erzeugt in Abhängigkeit seiner Position und im rechten Winkel zu dieser Position einen virtuellen Luftspalt in dem Magnetkern. Dieses bewegliche Element beeinflußt so den Magnetstreufluß und folglich die elektrische Spannung, die durch eine Detektionsspule geliefert wird, die mit dem Magnetkern gekoppelt ist.The movable element that is executed by a permanent magnet, generated in dependence his position and at right angles to this position a virtual Air gap in the magnetic core. This moving element will affect that Magnetic flux and consequently the electrical voltage passing through a detection coil is supplied, which is coupled to the magnetic core.
Bei
dem in der
In
dem Patent
Andere Sensoren, die entweder über unterschiedliche Erregerspulen oder unterschiedliche Meßspulen verfügen, arbeiten in gleicher Weise in dem Maße, wie die Spannung, die in jede Sekundärspule induziert wird, von der Position des beweglichen Elements abhängt und linear mit seiner Bewegung variiert.Other Sensors that either over different excitation coils or different measuring coils feature, work in the same way as the tension in every secondary coil is induced, depends on the position of the movable element and varies linearly with its movement.
Bei diesen bekannten Sensoren ist der Magnetkern jeweils ein längliches Band, das eine Sättigung durch ein Magnetfeld entsprechend seiner Dicke zuläßt. Die Wicklungsvorgänge um einen solchen Kern sind nicht leicht durchzuführen. Im übrigen besitzen diese bekannten Sensoren wegen der abgeflachten Form des Kerns und wegen des beweglichen Magneten, der sich in der Nähe des Kerns bewegen muß, einen nicht unerheblichen Raumbedarf. Zudem benötigen sie bekannten Sensoren relativ präzise Führungsmittel zur Führung des beweglichen Elements unter Berücksichtigung der asymmetrischen Konfiguration, die den Sensor empfindlich gegenüber Bewegungen, wie zum Beispiel Wippen des beweglichen Elements gemäß seiner Achse oder des Sensors um seine Achse, macht.at These known sensors, the magnetic core is an elongated each Band, that is a saturation allowed by a magnetic field according to its thickness. The winding operations to such a core are not easy to perform. Moreover, these have known Sensors because of the flattened shape of the core and because of the mobile Magnets that are nearby of the core, a not insignificant amount of space. In addition, they need known sensors relatively precise guide means to the leadership of the movable element taking into account the asymmetrical Configuration that makes the sensor sensitive to movement, such as Rocking of the movable element according to its axis or the sensor around its axis, does.
Aus
der
Offenbarung der Erfindungepiphany the invention
Aufgabe der vorliegenden Erfindung ist es, die oben dargelegten Nachteile zu beheben und einen kontaktlosen Magnetsensor vorzuschlagen, der es bei geringem Raumbedarf und einfacher Herstellung erlaubt, die Position eines beweglichen Elementes zu detektieren.task It is the object of the present invention to overcome the disadvantages set forth above to fix and to propose a contactless magnetic sensor that it with little space requirement and simple production allows the position to detect a movable element.
Dazu schlägt die Erfindung einen Magnetpositionssensor zum Detektieren der Position eines beweglichen Elements vor, das sich kontaktlos entlang eines Magnetkerns bewegt, der durch wenigstens eine Erregerspule magnetisiert ist, welche mit Wechselstrom versorgt wird, wobei das bewegliche Element aus einem Magneten ausgeführt ist, der einen virtuellen Luftspalt in dem Magnetkern erzeugt und in Abhängigkeit seiner Position den Magnetstreufluß und folglich die Spannung beeinträchtigt, die durch wenigstens eine Detektionsspule geliefert wird, welche mit dem Magnetkern gekoppelt ist. Gemäß der Erfindung ist der Magnetkern aus einem massiven Körper ausgeführt und weist ein kreisförmiges Querschnittsprofil auf.To beats the invention a magnetic position sensor for detecting the position a movable element that contacts itself without contact Magnet core moves, which magnetized by at least one excitation coil which is supplied with alternating current, wherein the movable Element is made of a magnet that is a virtual Air gap generated in the magnetic core and depending on its position the Magnetic flux and consequently the tension is impaired, which is supplied by at least one detection coil, which is coupled to the magnetic core. According to the invention, the magnetic core from a massive body accomplished and has a circular Cross-sectional profile on.
Der Einsatz eines Magnetkerns in Zylinderform erleichtert die Wicklungsvorgänge für die Erreger- und Detektionsspulen. Ein solcher Sensor weist ebenfalls einen begrenzten Raumbedarf unter Berücksichtigung der Rotationsform auf, welche im übrigen eine Symmetrie aufweist, die den Sensor kaum empfindlich gegenüber ungewollten Bewegungen des beweglichen Elements im Verhältnis zum Magnetkern macht.Of the Use of a magnetic core in cylindrical form facilitates the winding processes for the pathogens. and detection coils. Such a sensor also has a limited Space requirement under consideration the rotational shape, which otherwise has a symmetry, the sensor barely sensitive to unwanted movements of the movable element in proportion to the magnetic core.
Vorzugsweise umfaßt der Sensor zwei Detektionsspulen, welche jede an einem Ende des Magnetkerns gewickelt sind. Bei dieser Ausführungsform kann die Erregerspule um den Magnetkern zwischen die beiden Detektionsspulen gewickelt werden, welche an den Enden des Magnetkerns angeordnet sind.Preferably comprises the sensor has two detection coils, each at one end of the Magnet core are wound. In this embodiment, the excitation coil wrapped around the magnetic core between the two detection coils which are arranged at the ends of the magnetic core.
Die Erregerspule kann einen kreisförmigen oder elliptischen Wicklungsquerschnitt aufweisen.The Exciter coil can be a circular or have elliptical winding cross-section.
Bei einer weiteren bevorzugten Ausführungsform umfaßt der Sensor ein polares Stück, das in einem Abstand und in Bezug zur Erregerspule angebracht ist, um das Schließen der Linien des Magnetflusses zu erlauben, der durch die Erregerspule erzeugt wird.at a further preferred embodiment comprises the sensor is a polar piece, which is mounted at a distance and in relation to the exciting coil, to close to allow the lines of magnetic flux generated by the exciting coil becomes.
Das polare Stück kann ein kreisförmiges oder parallelelliptisches Querschnittsprofil aufweisen.The polar piece can be a circular or have parallel elliptical cross-sectional profile.
Des weiteren ist Aufgabe der Erfindung, eine Detektionsanordnung vorzuschlagen, die zwei der genannten Magnetdetektionssensoren umfaßt, welche nebeneinander derart angebracht sind, daß die Magnetkerne parallel stehen und die beweglichen Elemente sich parallel zueinander bewegen.Of Another object of the invention is to propose a detection arrangement, which comprises two of said magnetic detection sensors, which side by side are mounted so that the magnetic cores parallel stand and move the movable elements parallel to each other.
Bei einer Ausführungsform dieser Anordnung sind die beweglichen Elemente, die Magnetkerne und gegebenenfalls die polaren Stücke spiegelsymmetrisch im Verhältnis zur Symmetrieebene angeordnet, welche zwischen den beiden Sensoren verläuft.at an embodiment this arrangement are the moving elements, the magnetic cores and optionally the polar pieces mirror-symmetrically in relation to Symmetrieebene arranged, which runs between the two sensors.
Bei einer anderen Ausführungsform sind die beweglichen Elemente, die Magnetkerne und gegebenenfalls die polaren Stücke umgekehrt spiegelsymmetrisch im Verhältnis zur Symmetrieebene angeordnet, die zwischen den beiden Sensoren verläuft.at another embodiment are the moving elements, the magnetic cores and possibly the polar pieces reversed mirror-symmetrically arranged in relation to the plane of symmetry, which runs between the two sensors.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden rein beispielhaften und nicht-beschränkenden Beschreibung in Verbindung mit der Zeichnung.Further Details and advantages of the invention will become apparent from the following purely exemplary and non-limiting description in conjunction with the drawing.
Kurze Beschreibung der ZeichnungenShort description the drawings
Beschreibung bevorzugter Ausführungsformendescription preferred embodiments
Der
Gegenstand der Erfindung betrifft, wie in den
Ein
solcher Magnetkern
Der
Sensor
In
klassischer Weise ist das bewegliche Element
Die
Wirkungsweise eines solchen kontaktlosen Magnetpositionssensors
ist dem Fachmann bekannt. Die Erregerspule
Ein
anderer Teil der Flußlinien,
die sogenannte Streulinien, verläßt den Magnetkern
In
Gegenwart des beweglichen Elements
Das
Differenzsignal zwischen den beiden Detektionsspulen
Gemäß der Erfindung
verfügt
der Magnetkern
Bevorzugterweise
besitzen die Erreger-
Die
Bei
bestimmten Anwendungen kann es vorteilhaft sein, eine Detektionsanordnung
zu bilden, die zwei Magnetdetektionssensoren
Die
beweglichen Elemente
Der
Einsatz von zwei Sensoren
Die
Es
sei bemerkt, daß bei
diesem Ausführungsbeispiel
jedes polare Stück
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0408273A FR2873807B1 (en) | 2004-07-27 | 2004-07-27 | NON-CONTACT POSITION MAGNETIC SENSOR |
FR0408273 | 2004-07-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102005035799A1 true DE102005035799A1 (en) | 2006-03-23 |
DE102005035799B4 DE102005035799B4 (en) | 2016-02-04 |
Family
ID=34947714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005035799.7A Active DE102005035799B4 (en) | 2004-07-27 | 2005-07-27 | Contactless magnetic position sensor |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102005035799B4 (en) |
FR (1) | FR2873807B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2149784A1 (en) | 2008-07-31 | 2010-02-03 | Kuhnke Automotive GmbH & Co. KG | Magnetic path sensor system |
DE102017211751A1 (en) * | 2017-07-10 | 2019-01-10 | Continental Teves Ag & Co. Ohg | Process for producing a soft magnetic element |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2909169B1 (en) * | 2006-11-29 | 2009-02-06 | Billanco | DEVICE AND METHOD FOR MEASURING THE POSITION OF A MOBILE PIECE. |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2325752C3 (en) * | 1973-05-21 | 1975-11-06 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Device for converting a path into an electrical quantity |
US4045787A (en) * | 1976-03-18 | 1977-08-30 | Illinois Tool Works Inc. | Sensors for sensing a plurality of parameters |
US4121185A (en) * | 1977-07-18 | 1978-10-17 | Illinois Tool Works Inc. | Linear position sensor |
FR2523719B1 (en) * | 1982-03-17 | 1985-09-13 | Merlin Gerin | POSITION DETECTOR OF A MOBILE ELEMENT, IN PARTICULAR OF A CONTROL BAR OF A NUCLEAR REACTOR |
DE3940280C2 (en) * | 1989-11-10 | 1994-09-01 | Siebert & Kuehn Dr | Device for determining the flow rate of a flow medium |
US5459399A (en) * | 1994-06-08 | 1995-10-17 | Otis Elevator Company | Trap for preventing mixing of flux between adjacent indicia and being disposed adjacent first and second sensors |
DE4425904A1 (en) * | 1994-07-21 | 1996-01-25 | Vacuumschmelze Gmbh | Magnetic displacement sensor |
DE4425903C2 (en) * | 1994-07-21 | 1997-03-20 | Siemens Ag | Device with a measuring transformer for detecting the position of a linearly movable object |
DE19919424A1 (en) * | 1999-04-28 | 2000-11-30 | Tyco Electronics Logistics Ag | Magnetic position sensor, its use and manufacture |
-
2004
- 2004-07-27 FR FR0408273A patent/FR2873807B1/en active Active
-
2005
- 2005-07-27 DE DE102005035799.7A patent/DE102005035799B4/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2149784A1 (en) | 2008-07-31 | 2010-02-03 | Kuhnke Automotive GmbH & Co. KG | Magnetic path sensor system |
DE102017211751A1 (en) * | 2017-07-10 | 2019-01-10 | Continental Teves Ag & Co. Ohg | Process for producing a soft magnetic element |
Also Published As
Publication number | Publication date |
---|---|
FR2873807B1 (en) | 2007-04-27 |
FR2873807A1 (en) | 2006-02-03 |
DE102005035799B4 (en) | 2016-02-04 |
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