DE102005007731A1 - Position sensor device, periodically biases soft magnetic structure into nonlinear saturation region and detects dip in induced voltage - Google Patents
Position sensor device, periodically biases soft magnetic structure into nonlinear saturation region and detects dip in induced voltage Download PDFInfo
- Publication number
- DE102005007731A1 DE102005007731A1 DE102005007731A DE102005007731A DE102005007731A1 DE 102005007731 A1 DE102005007731 A1 DE 102005007731A1 DE 102005007731 A DE102005007731 A DE 102005007731A DE 102005007731 A DE102005007731 A DE 102005007731A DE 102005007731 A1 DE102005007731 A1 DE 102005007731A1
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- Germany
- Prior art keywords
- circuit board
- position sensor
- printed circuit
- arrangement according
- sensor arrangement
- 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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Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 43
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 238000011156 evaluation Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Die
Erfindung betrifft eine Positionssensoranordnung mit Sensor-Planarspulen,
die mit einer weichmagnetischen Struktur zusammenwirken, die positionsabhängig durch
einen bewegbaren Permanentmagneten in sättigungsnahe, unlineare Bereiche gelangt,
was durch eine an der betreffenden Position angeordnete Sensor-Planarspule
erfasst werden kann. Eine derartige Positionssensoranordnung ist aus
der
Eine Aufgabe der vorliegenden Erfindung besteht darin, eine Positionssensoranordnung dieser Art zu schaffen, die auch über eine längere Bewegungsbahn des Permanentmagneten dessen Position auf einfache und kostengünstige Weise erfassen kann, wobei eine hohe Empfindlichkeit erreicht wird.A The object of the present invention is a position sensor arrangement of this kind, which also has a longer trajectory of the permanent magnet can capture its position in a simple and cost-effective way, whereby a high sensitivity is achieved.
Diese Aufgabe wird erfindungsgemäß durch eine Positionssensoranordnung mit den Merkmalen des Anspruchs 1 gelöst.These The object is achieved by a Position sensor arrangement solved with the features of claim 1.
Die Vorteile der vorliegenden Erfindung bestehen insbesondere darin, dass eine sehr hohe Empfindlichkeit dadurch erreicht wird, dass durch eine Erregerspulenanordnung das weichmagnetische Material periodisch in die Nähe des unlinearen Bereichs gebracht wird, sodass dieses bereits bei einer relativ geringen Feldstärke durch den Permanentmagneten in sättigungsnahe, unlineare Bereiche gelangt. Die Auswertung erfolgt unter Vermeidung einer kostspieligen Frequenzerzeugung und -erfassung in einfacher und kostengünstiger Weise durch Erfassung des Einbruchs der induzierten Spannung in der jeweiligen Sensor-Planarspule, wenn der entsprechende Bereich der magnetischen Struktur in den unlinearen Sättigungsbereich gelangt. Dies führt in Verbindung mit einer entsprechend der zu erfassenden Wegstrecke langen Reihe von Sensor-Planarspulen zu einer sehr exakten und empfindlichen Positionserfassung über diese Strecke. Die Positionserfassung eignet sich dadurch beispielsweise für Linearantriebe, bei denen die Bahn des Permanentmagneten nicht unmittelbar und direkt entlang der Sensor-Planarspulen gelegt werden kann.The Advantages of the present invention are, in particular, that a very high sensitivity is achieved by by an exciting coil arrangement, the soft magnetic material periodically close of the nonlinear area, so this already at a relatively low field strength through the permanent magnet near saturation, reaches unlinear areas. The evaluation takes place under avoidance costly frequency generation and detection in a simpler way and cheaper Way by detecting the onset of the induced voltage in the respective sensor planar coil, if the corresponding area the magnetic structure enters the non-linear saturation region. This leads in Connection with a corresponding to the distance to be detected long series of sensor planar coils for a very precise and sensitive position detection over these Route. The position detection is suitable for example for linear drives, where the track of the permanent magnet is not direct and direct can be placed along the sensor planar coils.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Positionssensoranordnung möglich.By in the subclaims listed activities are advantageous developments and improvements in the claim 1 specified position sensor arrangement possible.
Die weichmagnetische Struktur besteht in vorteilhafter Weise aus sich in der Längsrichtung der Leiterplattenanordnung erstreckenden Bereichen mit spezifischer magnetischer Leitfähigkeit, wobei es sich vorzugsweise um eine amorphe Struktur handelt. Dies kann durch spezifische Magnetisierungsvorgänge erreicht werden, oder die Bereiche werden durch eine Reihe von Flächenmustern gebildet, insbesondere streifenförmigen, rechteckförmigen, ringförmigen, gekreuzten, kreuzförmigen oder runden Flächenmustern.The soft magnetic structure is advantageously made of itself in the longitudinal direction the PCB assembly extending areas with specific magnetic conductivity, which is preferably an amorphous structure. This can be achieved by specific magnetization processes, or the Regions are formed by a series of surface patterns, in particular striped, rectangular, annular, crossed, cross-shaped or round surface patterns.
Jedem Bereich oder Flächenmuster ist zweckmäßigerweise eine Sensor-Planarspule zugeordnet, die bei Erreichen der Sättigung des jeweiligen Bereichs oder Flächenmusters einen Einbruch der induzierten Spannung erfährt, der als Sensorsignal auswertbar ist.Each Area or area pattern is expediently associated with a sensor planar coil when reaching saturation of the respective area or area pattern experiences a collapse of the induced voltage, which can be evaluated as a sensor signal is.
Die die Erregerspulenanordnung bildende leitfähige Struktur umgreift die magnetische Struktur in der Längsrichtung der Leiterplattenanordnung unter Bildung von wenigstens einer Windung, um die magnetische Struktur nahezu an die magnetische Sättigung zu bringen.The the exciting coil assembly forming conductive structure surrounds the magnetic structure in the longitudinal direction the circuit board assembly forming at least one turn, around the magnetic structure almost to the magnetic saturation bring to.
In einer besonders vorteilhaften Ausgestaltung besteht die Leiterplattenanordnung aus mehreren übereinanderliegenden Schichten, wobei eine Schicht die magnetische Struktur trägt oder diese bildet, und wobei zu beiden Seiten dieser Schicht angeordnete Leiterplatten zusammen die Erregerspulenanordnung tragen, wobei die eine Leiterplatte deren wenigstens eine Halbwindung und die andere Leiterplatte deren zugeordnete zweite Halbwindung oder Halbwindungen trägt. Eine weitere Schicht trägt in einer vorteilhaften Ausgestaltung die Sensor-Planarspulen. Auf diese Weise lässt sich die magnetische Anordnung in einfacher Weise schichtweise aufbauen, was zu einer für die Massenfertigung geeigneten, kostengünstigen, dünnen Leiterplattenanordnung mit nahezu beliebiger Längenausdehnung führt.In a particularly advantageous embodiment, the circuit board assembly from several superimposed Layers, one layer bearing the magnetic structure or this forms, and being arranged on both sides of this layer PCB together carry the exciting coil assembly, wherein the one circuit board whose at least one half-turn and the another printed circuit board whose associated second Halbwindung or half turns wearing. Another layer is wearing in an advantageous embodiment, the sensor planar coils. On that way build up the magnetic arrangement in a simple manner in layers, what a for the mass production of suitable, inexpensive, thin circuit board assembly with almost any length extension leads.
Optimale Verhältnisse erreicht man bei einem in der Längsrichtung der Leiterplattenanordnung magnetisierten Permanentmagneten.optimal conditions one reaches one in the longitudinal direction the circuit board assembly magnetized permanent magnet.
Zur Erfassung der Einbrüche der in den Sensor-Planarspulen induzierten Spannungen dient in vorteilhafter Weise eine Auswerteelektronik zum Messen der Ströme in den Sensor-Planarspulen. Hierzu sind zweckmäßigerweise Strommesswiderstände in Reihe zu den Sensor-Planarspulen geschaltet. In einer vorteilhaften Ausgestaltung besitzt die Auswerteelektronik Mittel zum sequenziellen Beaufschlagen der Sensor-Planarspulen mit Messspannungen, sodass der Zustand dieser Sensor-Planarspulen sequenziell abgefragt werden kann. Als Mittel hierfür eignet sich insbesondere ein Schieberegister.to Recording the burglary the voltages induced in the sensor planar coils are used advantageously Way an evaluation for measuring the currents in the sensor planar coils. For this are expediently Current Sense Resistors connected in series to the sensor planar coils. In an advantageous Design has the transmitter means for sequential Applying the sensor planar coils with measuring voltages, so the state of these sensor planar coils can be queried sequentially. As a means for this purpose in particular a shift register.
In einer praktischen Ausführung ist die Leiterplattenanordnung im Längsschlitz des Gehäuses eines Linearantriebs angeordnet, wobei ein bewegbares Element des Linearantriebs den Permanentmagneten trägt.In a practical design is the circuit board assembly in the longitudinal slot of the housing one Linear drive arranged, wherein a movable element of the linear drive carries the permanent magnet.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:embodiments The invention are illustrated in the drawing and in the following description explained in more detail. It demonstrate:
Die
in
Auf
der Leiterplattenanordnung
Eine
Erregerspule
Will man radiale und axiale Feldkomponenten fassen, um einen sehr breiten Ansprechbereich zu erreichen, so eignen sich gekreuzte Amorphbandkerne, also kreuzförmig übereinanderliegende Amorphbandkerne oder direkt kreuzförmige Amorphbandkerne. Als besonders geeignet haben sich kreuzförmige Amorphbandkerne erwiesen, da dort besonders wenig Streufelder auftreten. Beide Anordnungen zeichnen sich darüber hinaus durch das Fehlen von Nebenmaxima aus.Want To summarize radial and axial field components to a very wide To reach the response range, crossed amorphous band cores, ie cross-shaped amorphous band cores or directly cross-shaped Amorphbandkerne. Cross-shaped amorphous band cores are particularly suitable proved because there are very few stray fields. Both arrangements stand out about it in addition to the absence of secondary maxima.
In
In
In
Die
in
Die
Wirkungsweise der in
Das
Schieberegister
Im
Ausführungsbeispiel
weist die Leiterplattenanordnung
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005007731A DE102005007731B4 (en) | 2005-02-19 | 2005-02-19 | Position sensor arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005007731A DE102005007731B4 (en) | 2005-02-19 | 2005-02-19 | Position sensor arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102005007731A1 true DE102005007731A1 (en) | 2006-08-24 |
| DE102005007731B4 DE102005007731B4 (en) | 2012-03-01 |
Family
ID=36776208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102005007731A Expired - Fee Related DE102005007731B4 (en) | 2005-02-19 | 2005-02-19 | Position sensor arrangement |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102005007731B4 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007001606A1 (en) * | 2007-01-10 | 2008-07-17 | Vacuumschmelze Gmbh & Co. Kg | Arrangement for measuring the position of a magnet relative to a magnetic core |
| DE102014010601A1 (en) * | 2014-07-18 | 2016-01-21 | Festo Ag & Co. Kg | Sensor arrangement and method for operating a sensor arrangement |
| DE102014219009A1 (en) * | 2014-09-22 | 2016-03-24 | Continental Teves Ag & Co. Ohg | position sensor |
| DE102016202402A1 (en) * | 2016-02-17 | 2017-08-17 | Continental Teves Ag & Co. Ohg | sensor |
| WO2017140678A1 (en) * | 2016-02-17 | 2017-08-24 | Continental Teves Ag & Co. Ohg | Sensor |
| US10060762B2 (en) | 2013-08-28 | 2018-08-28 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Inductive sensor comprising integrated soft magnetic layer and method for the production thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013014282A1 (en) * | 2013-08-27 | 2015-03-05 | Hydac Electronic Gmbh | Position measuring system and method for determining position |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311973A1 (en) * | 1993-04-14 | 1997-02-13 | Pepperl & Fuchs | Magneto-inductive sensor array for determining position and/or travel - has magnets which move over and saturate magnetic panel, provided with pairs of coils forming transmitter/receiver systems, voltages induced in coils being measured |
| DE19711781A1 (en) * | 1997-03-12 | 1998-10-01 | Pepperl & Fuchs | Movable magnet position detector |
| DE20009335U1 (en) * | 2000-05-24 | 2001-10-04 | Gebhard Balluff Fabrik feinmechanischer Erzeugnisse GmbH & Co, 73765 Neuhausen | Position measuring system |
-
2005
- 2005-02-19 DE DE102005007731A patent/DE102005007731B4/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311973A1 (en) * | 1993-04-14 | 1997-02-13 | Pepperl & Fuchs | Magneto-inductive sensor array for determining position and/or travel - has magnets which move over and saturate magnetic panel, provided with pairs of coils forming transmitter/receiver systems, voltages induced in coils being measured |
| DE19711781A1 (en) * | 1997-03-12 | 1998-10-01 | Pepperl & Fuchs | Movable magnet position detector |
| DE20009335U1 (en) * | 2000-05-24 | 2001-10-04 | Gebhard Balluff Fabrik feinmechanischer Erzeugnisse GmbH & Co, 73765 Neuhausen | Position measuring system |
Non-Patent Citations (2)
| Title |
|---|
| Haba, C.G. u.a.: Optimization of a ferromagnetic displacement sensor. In: Sensors and Actuators A. 1997, Vol. 59, S. 136-141 * |
| Popovic, R.S.; Flanagan, J.A.; Besse, P.A.: The future of magnetic sensors. In: Sensors and Actu- ators A. 1996, Vol. 56, S. 39-55, insbesondere S. 49-51 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007001606A1 (en) * | 2007-01-10 | 2008-07-17 | Vacuumschmelze Gmbh & Co. Kg | Arrangement for measuring the position of a magnet relative to a magnetic core |
| EP1944568A3 (en) * | 2007-01-10 | 2009-10-14 | Vacuumschmelze GmbH & Co. KG | Assembly for measuring the position of a magnet relative to a magnetic core |
| US10060762B2 (en) | 2013-08-28 | 2018-08-28 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Inductive sensor comprising integrated soft magnetic layer and method for the production thereof |
| DE102014010601A1 (en) * | 2014-07-18 | 2016-01-21 | Festo Ag & Co. Kg | Sensor arrangement and method for operating a sensor arrangement |
| DE102014219009A1 (en) * | 2014-09-22 | 2016-03-24 | Continental Teves Ag & Co. Ohg | position sensor |
| WO2017140677A1 (en) * | 2016-02-17 | 2017-08-24 | Continental Teves Ag & Co. Ohg | Sensor |
| WO2017140678A1 (en) * | 2016-02-17 | 2017-08-24 | Continental Teves Ag & Co. Ohg | Sensor |
| DE102016202402A1 (en) * | 2016-02-17 | 2017-08-17 | Continental Teves Ag & Co. Ohg | sensor |
| CN108603770A (en) * | 2016-02-17 | 2018-09-28 | 大陆-特韦斯股份有限公司 | Sensor |
| CN108700434A (en) * | 2016-02-17 | 2018-10-23 | 大陆-特韦斯贸易合伙股份公司及两合公司 | sensor |
| US20190025087A1 (en) * | 2016-02-17 | 2019-01-24 | Continental Teves Ag & Co. Ohg | Sensor |
| US10866120B2 (en) | 2016-02-17 | 2020-12-15 | Continental Teves Ag & Co. Ohg | Sensor |
| US11169006B2 (en) | 2016-02-17 | 2021-11-09 | Continental Teves Ag & Co. Ohg | Sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005007731B4 (en) | 2012-03-01 |
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