DE102004027954B4 - Inductive protractor, especially for the measurement of torsion angles - Google Patents
Inductive protractor, especially for the measurement of torsion angles Download PDFInfo
- Publication number
- DE102004027954B4 DE102004027954B4 DE102004027954.3A DE102004027954A DE102004027954B4 DE 102004027954 B4 DE102004027954 B4 DE 102004027954B4 DE 102004027954 A DE102004027954 A DE 102004027954A DE 102004027954 B4 DE102004027954 B4 DE 102004027954B4
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- rotor
- angle sensor
- stator
- torsion
- receiving element
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- 230000001939 inductive effect Effects 0.000 title claims abstract description 14
- 238000005259 measurement Methods 0.000 title claims abstract description 5
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 230000005284 excitation Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000009351 contact transmission Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Images
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
- G01D5/204—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 mutual induction between two or more coils
- G01D5/2073—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 mutual induction between two or more coils by movement of a single coil with respect to two or more coils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
- B62D15/021—Determination of steering angle
- B62D15/0215—Determination of steering angle by measuring on the steering column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
- B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/221—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Induktiver Winkelsensor, insbesondere für die Messung von Torsionswinkeln, zum Beispiel an Lenksäulen:- mit einem Stator (1), der zumindest ein Erregerelement (4) und zumindest ein erstes Empfangselement (4) umfasst,- mit einem ersten Rotor (2), der zumindest ein zweites Empfangselement (6) und elektronische Elemente (7) zur Auswertung der von dem zweiten Empfangselement (6) gelieferten Signale umfasst,- mit einem zweiten Rotor (3), der zumindest ein induktives Koppelelement (10) umfasst, wobei das zweite Empfangselement (6) mit dem Koppelelement (10) zusammenwirkt und- mit einem Torsionselement (9) auf dem der erste Rotor (2) und der zweite Rotor (3) beabstandet voneinander angeordnet sind.Inductive angle sensor, in particular for the measurement of torsion angles, for example on steering columns: - with a stator (1) comprising at least one exciter element (4) and at least one first receiving element (4), - with a first rotor (2) comprising at least a second receiving element (6) and electronic elements (7) for evaluating the signals supplied by the second receiving element (6), - having a second rotor (3) comprising at least one inductive coupling element (10), wherein the second receiving element (6) cooperates with the coupling element (10) and with a torsion element (9) on which the first rotor (2) and the second rotor (3) are arranged spaced from each other.
Description
STAND DER TECHNIKSTATE OF THE ART
Die Erfindung betrifft einen induktiven Winkelsensor, insbesondere für die Messung von Torsionswinkeln zum Beispiel an Lenksäulen in Kraftfahrzeugen.The invention relates to an inductive angle sensor, in particular for the measurement of torsion angles, for example on steering columns in motor vehicles.
Aus dem Stand der Technik, zum Beispiel aus der Druckschrift mit der Veröffentlichungsnummer
Ein solcher Winkelsensor kann beispielsweise dazu verwendet werden, um die Torsion eines Stabes zu messen. Dazu wird der Rotor beabstandet zu dem Stator auf dem Stab drehfest befestigt. Die Verdrehung des Stabs kann dann erfasst werden. Problematisch ist eine Erfassung des Torsionswinkels jedoch dann, wenn der Stab nicht nur in sich verdreht, sondern auch gegenüber der Umgebung gedreht wird. Dieses ist üblicherweise bei einer Lenksäule der Fall. Problematisch bei der Verwendung des Winkelsensors an einem sich drehenden Torsionsstab ist, dass der Stator nicht gegenüber anderen elektrischen Einheiten, mit denen er verbunden ist, und die er mit den Sensorsignalen versorgen soll, ruht. Der Stator dreht sich vielmehr gegenüber den Einheiten, welche Schwierigkeiten für die elektrische Versorgung des Winkelsensors und mit der Übermittelung der Sensorsignale nach sich zieht. Eine Möglichkeit der Verbindung des Winkelsensors und insbesondere des Stators des Winkelsensors ist, den Stator über ein Flachbandkabel, welches in verschiedene Richtungen mehrfach auf- und abgewickelt werden kann, anzuschließen. Die Verbindung bei einem Flachbandkabel zieht jedoch immer wieder Probleme mit Kabelbrüchen nach sich. Die Zuverlässigkeit des Anschlusses beim Flachbandkabel ist nicht immer gegeben.Such an angle sensor can be used, for example, to measure the torsion of a rod. For this purpose, the rotor is fixed in a rotationally fixed manner spaced apart from the stator on the rod. The twist of the rod can then be detected. However, a detection of the torsion angle is problematic when the rod is not only twisted in itself, but also rotated with respect to the environment. This is usually the case with a steering column. The problem with using the angle sensor on a rotating torsion bar is that the stator does not rest against other electrical units to which it is connected and which it is to supply with the sensor signals. Instead, the stator rotates with respect to the units, which causes difficulties for the electrical supply of the angle sensor and with the transmission of the sensor signals. One way of connecting the angle sensor and in particular the stator of the angle sensor, the stator via a ribbon cable, which can be repeatedly wound up and unwound in different directions to connect. However, the connection in a ribbon cable always causes problems with cable breaks. The reliability of the connection with the ribbon cable is not always given.
Abhilfe kann der Winkelsensor schaffen, der aus der Druckschrift
Weitere Winkelsensoren sind aus den Druckschriften
VORTEILE DER ERFINDUNGADVANTAGES OF THE INVENTION
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen induktiven Winkelsensor vorzuschlagen, der für die Messung von Torsionswinkeln geeignet ist, wobei das tordierende Element rotieren kann und die Konstruktion einfacher ist als die aus der Druckschrift
Diese Aufgabe wird durch einen erfindungsgemäßen Winkelsensor nach Anspruch 1 gelöst. Weiterbildungen und Konkretisierungen eines solchen Winkelsensors finden sich in den Unteransprüchen.This object is achieved by an angle sensor according to
Ein erfindungsgemäßer Winkelsensor weist demgemäß einen Stator mit zumindest einem Erregerelement und einem ersten Empfangselement auf. Er umfasst ferner einen ersten Rotor und neben diesem ersten Rotor einen zweiten Rotor, der zumindest ein induktives Koppelelement umfasst. Der erste Rotor und der zweite Rotor sind auf einem Torsionselement beabstandet voneinander angeordnet. Bei der erfindungsgemäßen Anordnung sind nur die beiden Rotoren auf dem Torsionselement angeordnet, während der Stator ortsfest ist. Damit bereitet die elektrische Anbindung des Stators keine Probleme.An inventive angle sensor accordingly has a stator with at least one excitation element and a first receiving element. It also comprises a first rotor and, in addition to this first rotor, a second rotor, which comprises at least one inductive coupling element. The first rotor and the second rotor are spaced apart on a torsion element. In the arrangement according to the invention, only the two rotors are arranged on the torsion element, while the stator is stationary. Thus, the electrical connection of the stator prepares no problems.
Der erste Rotor eines erfindungsgemäßen Winkelsensors umfasst zumindest ein zweites Empfangselement. Dieses zweite Empfangselement wirkt mit dem Koppelelement des zweiten Rotors zusammen. Es ist dadurch möglich, dass die Verdrehung des ersten Rotors relativ zum zweiten Rotor über das Zusammenspiel von Koppelelement und Empfangselement und Erregerelement des Stators ermittelt wird. Der erste Rotor weist elektronische Elemente auf. Diese elektronischen Elemente dienen der Auswertung von dem zweiten Empfangselement gelieferter Signale.The first rotor of an angle sensor according to the invention comprises at least one second receiving element. This second receiving element cooperates with the coupling element of the second rotor. It is thereby possible that the rotation of the first rotor is determined relative to the second rotor via the interaction of coupling element and receiving element and excitation element of the stator. The first rotor has electronic elements. These electronic elements are used for the evaluation of signals supplied by the second receiving element.
Ein erfindungsgemäßer Winkelsensor kann ferner Elemente zur vorteilhaft drahtlosen und berührungsfreien Übertragung einer Versorgungsspannung vom Stator zum ersten Rotor aufweisen. Damit können elektronische Elemente, die auf dem ersten Rotor angeordnet sind, mit elektrischer Energie versorgt werden.An inventive angle sensor may further comprise elements for advantageously wireless and non-contact transmission of a supply voltage from the stator to the first rotor. In this way, electronic elements arranged on the first rotor can be supplied with electrical energy.
Der erste Rotor umfasst vorteilhaft zumindest ein Sendeelement für eine berührungsfreie Übertragung der von den elektronischen Elementen zur Auswertung erzeugten Signale. Das Sendeelement kann dann die von den elektronischen Elementen erzeugten Signale zum Stator übertragen.The first rotor advantageously comprises at least one transmitting element for a non-contact transmission of the signals generated by the electronic elements for evaluation. The transmitting element can then transmit the signals generated by the electronic elements to the stator.
Das Sendeelement auf dem ersten Rotor kann vorteilhaft zumindest eine Spule umfassen. Ebenso können die Empfangselemente des Stators und des ersten Rotors Spulen sein. Auch das Erregerelement des Stators kann eine Spule sein. Die Spule kann zugleich das Empfangselement des Stators bilden. Der erste Rotor kann zwischen dem Stator und dem zweiten Rotor angeordnet sein. Insbesondere bei einem sehr dünn ausgeführten zweiten Rotor kann der zweite Rotor auch zwischen dem Stator und dem ersten Rotor angeordnet sein. Ferner kann der induktive Winkelsensor so eingerichtet sein, dass auch der Drehwinkel zwischen dem ersten Rotor und dem Stator erfasst wird, wobei dazu die schon vorhandenen Erregerelemente, Empfangselemente und Spulen genutzt werden können.The transmitting element on the first rotor can advantageously comprise at least one coil. Likewise, the receiving elements of the stator and the first rotor may be coils. The exciter element of the stator can also be a coil. The coil can also form the receiving element of the stator. The first rotor may be disposed between the stator and the second rotor. In particular, in the case of a very thin second rotor, the second rotor may also be arranged between the stator and the first rotor. Furthermore, the inductive angle sensor can be set up in such a way that the angle of rotation between the first rotor and the stator is also detected, for which purpose the already existing excitation elements, receiving elements and coils can be used.
Figurenlistelist of figures
Ein Beispiel für einen erfindungsgemäßen induktiven Winkelsensor ist anhand der Zeichnung näher beschrieben. Darin zeigt
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1 den schematischen Aufbau des erfindungsgemäßen Winkelsensors.
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1 the schematic structure of the angle sensor according to the invention.
BESCHREIBUNG DER AUSFÜHRUNGSBEISPIELEDESCRIPTION OF THE EMBODIMENTS
Der in der
Der erfindungsgemäße Winkelsensor kann beispielsweise in einem Kraftfahrzeug eingesetzt werden, um die durch einen Fahrzeugführer aufgebrachte und auf die Lenkung einwirkende Kraft zu bestimmen. Dazu ist der Torsionsstab
Der Stator
Der erste Rotor
Der zweite Rotor
Die Leiterschleife
Der erste Rotor eines erfindungsgemäßen Winkelsensors hat mehrere Funktionen. Zum einen erfasst er die Drehwinkeldifferenz zwischen dem ersten Rotor
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004027954.3A DE102004027954B4 (en) | 2004-06-08 | 2004-06-08 | Inductive protractor, especially for the measurement of torsion angles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004027954.3A DE102004027954B4 (en) | 2004-06-08 | 2004-06-08 | Inductive protractor, especially for the measurement of torsion angles |
Publications (2)
Publication Number | Publication Date |
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DE102004027954A1 DE102004027954A1 (en) | 2005-12-29 |
DE102004027954B4 true DE102004027954B4 (en) | 2018-06-14 |
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DE102004027954.3A Expired - Fee Related DE102004027954B4 (en) | 2004-06-08 | 2004-06-08 | Inductive protractor, especially for the measurement of torsion angles |
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DE (1) | DE102004027954B4 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108469246A (en) * | 2018-06-12 | 2018-08-31 | 安徽江淮汽车集团股份有限公司 | A kind of simple steering column rotary gap survey tool |
DE102020102577A1 (en) * | 2019-12-12 | 2021-06-17 | HELLA GmbH & Co. KGaA | Position sensor for inductive detection of a position |
DE102022124999A1 (en) | 2022-09-28 | 2024-03-28 | HELLA GmbH & Co. KGaA | Contactless inductive multi-channel rotation angle sensor |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7726208B2 (en) | 2006-11-22 | 2010-06-01 | Zf Friedrichshafen Ag | Combined steering angle and torque sensor |
DE102006055049B3 (en) * | 2006-11-22 | 2008-06-12 | Cherry Gmbh | Combined steering angle and torque sensor |
DE102008006865B4 (en) * | 2008-01-31 | 2024-02-29 | HELLA GmbH & Co. KGaA | Inductive torque sensor |
DE102008008835B4 (en) | 2008-02-13 | 2010-04-22 | Zf Friedrichshafen Ag | Device for determining a torque |
DE102008012923A1 (en) | 2008-03-06 | 2009-09-10 | Hella Kgaa Hueck & Co. | Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material |
DE102008012922B4 (en) | 2008-03-06 | 2019-05-29 | HELLA GmbH & Co. KGaA | Inductive angle sensor |
EP2120017A1 (en) | 2008-05-13 | 2009-11-18 | Hella KG Hueck & Co. | Rotation sensor |
DE102010009497B4 (en) | 2010-02-26 | 2024-06-06 | HELLA GmbH & Co. KGaA | Rotation sensor |
DE102010018724A1 (en) | 2010-04-29 | 2011-11-03 | Hella Kgaa Hueck & Co. | Inductive rotation angle sensor |
US8866495B2 (en) | 2010-06-30 | 2014-10-21 | Access Business Group International Llc | Spatial tracking system and method |
DE102015119530A1 (en) * | 2015-11-12 | 2017-05-18 | Hella Kgaa Hueck & Co. | Device for detecting a rotational movement |
DE102017210655B4 (en) * | 2017-06-23 | 2023-12-21 | Robert Bosch Gmbh | Rotation angle sensor |
WO2019146637A1 (en) * | 2018-01-23 | 2019-08-01 | 株式会社アミテック | Inductive rotation detection device |
DE102018102094A1 (en) * | 2018-01-31 | 2019-08-01 | Thyssenkrupp Ag | Inductive angle sensor for a motor vehicle steering |
DE102018209243A1 (en) * | 2018-06-11 | 2019-12-12 | Audi Ag | Drive system for a vehicle |
FR3093182B1 (en) * | 2019-02-25 | 2021-05-07 | Moving Magnet Tech | Position sensor, in particular intended for detecting the torsion of a steering column |
DE102019218399A1 (en) | 2019-11-27 | 2021-05-27 | Infineon Technologies Ag | INDUCTIVE ANGLE SENSOR WITH DISTANCE DETERMINATION |
DE102020115424A1 (en) | 2020-06-10 | 2021-12-16 | HELLA GmbH & Co. KGaA | Inductive position sensor |
DE102022130122A1 (en) | 2022-11-15 | 2024-05-16 | HELLA GmbH & Co. KGaA | Adapter for attaching a rotor of a sensor to one end of a shaft |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3707831A1 (en) | 1986-03-12 | 1987-09-17 | Tokai Trw & Co | TORQUE LOCKING DEVICE |
DE19738893A1 (en) | 1997-01-29 | 1998-07-30 | Samsung Electronics Co Ltd | Switching signal generator and using synchronous SRAM |
DE19941464A1 (en) | 1999-09-01 | 2001-03-15 | Hella Kg Hueck & Co | Inductive position sensor |
DE19946934A1 (en) * | 1999-09-30 | 2001-05-17 | Daimler Chrysler Ag | Module with angle sensors, non-contact energy transmission and non-contact information transmission |
DE10113997A1 (en) | 2000-03-30 | 2001-10-18 | Delphi Tech Inc | Sensor for differential angle positioning on a steering column couples to a microprocessor while having upper and lower flow filters aligned coaxially to receiver and transmitter coils |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19948934A1 (en) * | 1999-10-11 | 2001-04-12 | Agfa Gevaert Ag | Color photographic material, useful for development thermally or with alkaline activator, contains N-(het)aryl-N'-(6-oxo- or 6-thio-1,3-oxazin- or -1,3-thiazin--2-yl)-hydrazine or condensed 1,2-diazine or 1,2-diazole compound |
-
2004
- 2004-06-08 DE DE102004027954.3A patent/DE102004027954B4/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3707831A1 (en) | 1986-03-12 | 1987-09-17 | Tokai Trw & Co | TORQUE LOCKING DEVICE |
DE19738893A1 (en) | 1997-01-29 | 1998-07-30 | Samsung Electronics Co Ltd | Switching signal generator and using synchronous SRAM |
DE19941464A1 (en) | 1999-09-01 | 2001-03-15 | Hella Kg Hueck & Co | Inductive position sensor |
DE19946934A1 (en) * | 1999-09-30 | 2001-05-17 | Daimler Chrysler Ag | Module with angle sensors, non-contact energy transmission and non-contact information transmission |
DE10113997A1 (en) | 2000-03-30 | 2001-10-18 | Delphi Tech Inc | Sensor for differential angle positioning on a steering column couples to a microprocessor while having upper and lower flow filters aligned coaxially to receiver and transmitter coils |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108469246A (en) * | 2018-06-12 | 2018-08-31 | 安徽江淮汽车集团股份有限公司 | A kind of simple steering column rotary gap survey tool |
DE102020102577A1 (en) * | 2019-12-12 | 2021-06-17 | HELLA GmbH & Co. KGaA | Position sensor for inductive detection of a position |
DE102022124999A1 (en) | 2022-09-28 | 2024-03-28 | HELLA GmbH & Co. KGaA | Contactless inductive multi-channel rotation angle sensor |
WO2024068189A1 (en) | 2022-09-28 | 2024-04-04 | HELLA GmbH & Co. KGaA | Contactless inductive multichannel rotation angle sensor |
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DE102004027954A1 (en) | 2005-12-29 |
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