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WO2010078963A1 - Dispositif de détection de paramètres de rotation - Google Patents

Dispositif de détection de paramètres de rotation Download PDF

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Publication number
WO2010078963A1
WO2010078963A1 PCT/EP2009/050162 EP2009050162W WO2010078963A1 WO 2010078963 A1 WO2010078963 A1 WO 2010078963A1 EP 2009050162 W EP2009050162 W EP 2009050162W WO 2010078963 A1 WO2010078963 A1 WO 2010078963A1
Authority
WO
WIPO (PCT)
Prior art keywords
detection device
gear
bearing
plane
sensor
Prior art date
Application number
PCT/EP2009/050162
Other languages
English (en)
Inventor
Franck Landrieve
Original Assignee
Aktiebolaget Skf
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aktiebolaget Skf filed Critical Aktiebolaget Skf
Priority to PCT/EP2009/050162 priority Critical patent/WO2010078963A1/fr
Publication of WO2010078963A1 publication Critical patent/WO2010078963A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/04—Hand wheels
    • B62D1/10—Hubs; Connecting hubs to steering columns, e.g. adjustable
    • B62D1/105—Non-rotatable hubs, e.g. the central part of the steering wheel not rotating
    • 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
    • B62D15/022—Determination of steering angle by measuring on the steering column on or near the connection between the steering wheel and steering column
    • 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
    • B62D15/0245—Means or methods for determination of the central position of the steering system, e.g. straight ahead position

Definitions

  • the present invention relates to the field of detection device for rotation parameters of two rotating elements relatively to a support element.
  • the present invention relates more particularly to detection devices and to instrumented bearing systems, suitable for a steering wheel mechanism adapted for example to an automotive vehicle, which includes two rotating elements like a steering wheel and a steering column and, preferably, including a fixed central block located at the centre of the steering wheel. That fixed central block does not move with the steering wheel and can be used for example for mounting control systems and/or airbags.
  • the patent application US 2007/0 194 512 discloses a steering wheel arrangement which includes a bearing and a gear mechanism between a steering wheel and a steering column. An airbag is included in a fixed central block in the centre of the steering wheel. During the rotation of the steering wheel by the driver, the steering column may be submitted to several rotation turns.
  • a detection device o f rotation parameters suitable for such steering wheel should detect angles along several rotation turns.
  • the disclosed steering wheel and steering column are not concentrically mounted.
  • An advantage of such arrangement is that the fixed central block is held through a free space, having the shape of a crescent moon, between the non concentric gear wheels.
  • One aim of the present invention is to add a detection device within a steering wheel arrangement which is already very compact.
  • the patent application EP 1 693 677 discloses a device for detecting rotation parameters of two rotating elements.
  • One of the rotating elements is a hollow shaft.
  • the other rotating element rotates inside the hollow shaft.
  • Both rotating elements are coaxial, rotate independently within a housing and are provided with coaxial, side-to- side, multipolar coding rings.
  • a unique sensor block is fixed on the housing and cooperates with the two coding rings.
  • a drawback of such detecting device is that it is not designed for non-coaxial rotating elements.
  • the patent application US 2004/0 046 547 describes an instrumented bearing for a steering wheel. It includes a detection device for rotation parameters which is located on the rotation axis of the steering wheel. A drawback of such instrumented bearing is that it is not compatible with a steering mechanism including a steering column.
  • the present invention provides a detection device for rotation parameters of a first and a second rotating element relatively to a support element which remedies the prementionned drawbacks. Such detection device is compatible with a steering mechanism including a steering wheel, a steering column and a fixed central block.
  • the invention also provides an instrumented bearing system for steering wheel mechanisms.
  • a detection device for rotation parameters of a first and a second rotating elements relatively to a support element comprises a first coding ring, coaxially secured to the first rotating element, and cooperating with a first sensor secured to the support element, a second coding ring, coaxially secured to the second rotating element, and cooperating with a second sensor secured to the support element.
  • Said first sensor is located radially outside o f the first coding ring.
  • Said second sensor is located radially inside the second coding ring.
  • the second rotating element may be located radially outside the support element.
  • the first rotating element may be a steering column.
  • the second rotating element may be a steering wheel.
  • the particular location of the second coding ring relatively to the second sensor provides a degree of flexibility for the location of the rotation axis of the second rotating element relatively to the rotation axis o f the first rotating element.
  • These rotation axis may be coaxial or non- coaxial.
  • the steering mechanism may have coaxial or non coaxial steering wheel and steering column.
  • the detection device may be used for any rotating mechanism, other than a steering mechanism.
  • the detection device may comprise an electronic circuit board fixed on the support element, receiving signal from both sensors, the device comprising computer means adapted to emit a signal corresponding to angular positions o f both rotating elements.
  • the computer means can be located on the circuit board or on another location.
  • the circuit board comprises emitting means adapted to send a signal of the sensor to the computer means.
  • a transmission between the emitting means and the computer means could use conductors or could be a wireless transmission.
  • At least one of the coding rings is a magnetic ring provided with one North and one South pole, the corresponding sensor having two magnetic sensor heads located on two perpendicular sensing axis passing by the magnetic corresponding ring centre.
  • These sensor heads may be "Hall effect” cells. They emit a signal which is proportional to the magnetic field at the location of the sensor head.
  • the computer means is adapted to emit a signal corresponding to the absolute angle within 360° rotation, of each rotating element.
  • the signal from one sensor head is proportional to the sinus of the angular position of the corresponding North pole.
  • the signal from the other magnetic head is proportional to the cosinus of the same angular position.
  • the two rotating elements are linked by a gear mechanism presenting a rotation ratio K of the two rotating elements. K is the ratio of the rotation speed of the faster rotating element divided by the rotation speed of the slower rotating element.
  • the computer means is adapted to emit a signal corresponding to an absolute angle of at least one rotating element within a number of turn of the slower rotating element up to 1/K- l .
  • the faster rotating element made one turn more than the slower rotating element.
  • the value of said difference of the angular position of the faster rotating element, less the angular position of the slower rotating element, progressively increases from 0 to 360°.
  • the computer means calculates the absolute angular position of both rotating elements and calculates the value of the difference o f these two angular positions.
  • the value of the difference is used to determine how many turns the slower rotating made from the absolute 0° . That absolute 0° is the position of the slower rotating element when the difference of the angular position is set up at a 0 value.
  • the two rotating elements are linked by a spring mechanism.
  • the computer means is preferably able to emit a signal corresponding to a mechanical torque transmitted from the first to the second rotating elements through the spring mechanism.
  • the difference of angular positions of the two rotating elements is set up at a 0 value when the spring mechanism is at a free stage.
  • the difference of the angular positions is null when the transmitted torque is null.
  • the difference between the angular values of the two spring extremities is proportional to the transmitted torque.
  • Such detection device can be used in a steering mechanism to measure the torque provided by the driver of a steering wheel.
  • the transmitted torque is measured continuously from a torque in one direction to a torque in the opposite direction. The result of the measurement can be used to pilot the power generator of a steering assistance device.
  • the invention provides an instrumented bearing system for steering wheel mechanism comprising a detection device as previously mentioned.
  • the support member o f said detection device comprises an external bearing receiving a steering wheel and an internal bearing receiving a steering column. Any of the previously mentioned detection devices can be included within the bearing system.
  • a "bearing plane” is intended to be, for ball bearing, the ball contracting plane; for rolling bearing, the median plane of the rolling elements; for anti-friction rings bearings, the median plane of the antifriction rings.
  • the internal and the external bearings are ball bearings located in the same bearing plane. This reduces the overall axial dimensions of the instrumented bearing system. The axial dimension of a steering mechanism is a critical issue for the security of the driver.
  • the instrumented bearing system comprises an electronic circuit board located in a circuit board plane, parallel to the bearing plane.
  • the rotation axis of the steering wheel is not coaxial to the rotation axis of the steering column.
  • the system comprises a gear mechanism including a first gear wheel, coaxial with the steering column, and a second gear wheel coaxial with the steering wheel. Said first gear wheel meshes with internal gear teeth of the second gear wheel.
  • the transmission ratio K of the gear mechanism is equal to the second gear wheel diameter, divided by the first gear wheel diameter, or is equal to the ratio of the gear wheel teeth numbers.
  • the rotation axis of the steering column and the steering wheel are parallel.
  • the internal and the external bearings are located in the same bearing plane and the first and second gear wheels are located on a gear plane, parallel to the bearing plane.
  • the gear plane is intended to be the median plane of the contacting area of the gear wheel teeth. This also reduces the overall axial dimensions of the instrumented bearing system.
  • the instrumented bearing system comprises an electronic circuit board located between the bearing plane and the gear plane.
  • the detection device is entirely located between the support element of the internal and external bearing and the gear mechanism.
  • the major part of the detection device is located radially between the internal and the external bearings.
  • the instrumented bearing system is therefore particularly compact.
  • the first gear wheel can rotate, relatively to the steering column, within a rotation stroke limited by two stops.
  • the first gear wheel is mechanically linked to the steering column by an elastic spring. The rotation stroke of the steering column, versus the first gear wheel, gives the possibility to measure both the transmitted torque and the absolute angle of the slowest rotating element within 1/K- l turns.
  • K I , 25.
  • the angular variation due to the spring compression/extension may be under ⁇ 7° .
  • FIG. 1 is a longitudinal cut view of a steering mechanism
  • FIG. 3 is the cross section view in III-III plane of Figure 1 ;
  • FIG. 4 is a cross section view in IV-IV plane of Figure 1 ;
  • FIG. 5 is a cross section view in V-V plane of Figure 1 ;
  • a steering mechanism of a vehicle is secured on an instrument panel 1 and comprises a steering wheel 2 and a steering column 3 , both mounted on an instrument bearing system 4.
  • the steering mechanism comprises a central block 5 secured to the instrument panel 1 by a pillar 6 passing through the instrumented bearing system 4.
  • the central block 5 is fixed and located at the centre of the steering wheel 2. It extents on a side of the instrumented bearing system 4 towards the driver of the vehicle, perpendicularly to a rotation axis 7 of the steering wheel 2. It covers all the instrumented bearing system 4.
  • the instrumented bearing system 4 comprises a dual bearing sub-assembly 45 which is made of two pressed steel flanges 13a, 13b, perpendicular to a rotation axis 14 of the steering column 3.
  • the flanges 13b has an external annular cup shape forming an inner ring 9 of an external bearing 10 and an annular internal shape forming an outer ring 1 1 of an internal bearing 12.
  • Both internal and external bearings 10, 12 are ball bearings.
  • the rotation axis 7 of the steering wheel 2 is parallel and non- coaxial to the rotation axis 14 of the steering column 3.
  • the external bearing 10 comprises an outer ring 15 press-fitted into an external body 16.
  • the steering wheel 2 is secured around the external body 16 of the instrumented bearing system 4. It can be press-fitted or glued.
  • the internal bearing 12 comprises an inner ring 17 press-fitted onto an internal body 18 of the instrumented bearing system 4.
  • the steering column 3 is assembled inside the internal body 18 by splines or the like.
  • the inner ring 17, the outer ring 15 , balls 19 and the two flanges 13a, 13b are assembled into one monobloc sub- assembly by rivets 20. It is a particularly cost effective dual bearing sub-assembly.
  • the two flanges support element 8 is secured on the instrument panel 1.
  • the instrumented bearing system 4 comprises a dual bearing sub-assembly 46 illustrated in Figure 2, which is made of two traditional ball bearings press-fitted inside and outside a thick flange.
  • the ball contacting area of the internal and the external bearings defines a single bearing plane 21 which will be referred to as the "bearing plane" 21.
  • the ball contacting area of each bearing may be located in parallel and different planes.
  • each external and/or internal bearing could be of any type of rolling bearings, self-aligning rolling bearings, any roller bearings, cylindrical roller bearings, tapered roller bearings, spherical roller bearings, toroidal roller bearings, thrust ball bearings, cylindrical roller thrust bearings, spherical roller thrust bearings, multi row ball bearings, needle roller bearings, single or multi row slewing ball or roller bearings, or any antifriction ring bearings.
  • Figures 1 , 3 , 4 illustrate a gear mechanism 22 and a spring mechanism 23 included in the instrumented bearing system 4.
  • the gear mechanism 22 comprises a first gear wheel 24, coaxial with the steering column 3 and a second gear wheel 25 coaxial with the steering wheel 2.
  • the second gear wheel 25 is a part of the external body 16 which has the general shape of a ring with a radially external cylindrical surface for receiving the steering wheel 2.
  • the radially internal surface of the ring shape comprises a cylindrical surface, designed for the reception of the dual bearing sub-assembly 45 , located at the axial end of the external body 16, near to the instrument panel 1.
  • the radially internal surface of the ring shape also comprises internal gear teeth 26 designed to engage with external teeth of the first gear wheel 24 and axially located to the axial end of the external body 16, far from the instrumented panel 1.
  • the first and second gear teeth are parallel to the rotation axis 7, 14 or have parallel conical shapes. Therefore, the gear mechanism 22 extends on a gear plane 27 parallel to the bearing plane 21 of the dual bearing sub- assembly. These two planes 27, 21 are located at each end sides of the instrumented bearing system 4.
  • the gear mechanism 22 has a transmission ratio K equal to the teeth number of the second gear wheel 25 divided by the teeth number of the first gear wheel 24.
  • the rotation axis 7 of the steering wheel 2 and the rotation axis 14 of the steering column 3 may not be parallel.
  • the first gear teeth and/or the second gear teeth have non parallel conical shapes.
  • the dual bearing sub-assembly does not extend along a single plane.
  • the rotation axis 7 and 14 are coaxial.
  • the gear mechanism 22 can be of the type of an epicyclic gear.
  • the spring mechanism 23 is dynamically connected in series with the gear mechanism 22. It comprises a spiral spring 28 which has an end 28a passing through a light 23a of a radial flange 29 and secured to the first gear wheel 24 and an opposite end 28b secured to the radial flange 29 of the internal body 18.
  • the first gear wheel 24 can rotate around the internal body 18 and the steering column 3.
  • the variation of the relative angular position of the first gear wheel 24 versus the steering column 3 is proportional to the compression or the extension of the spiral spring 28.
  • the spring mechanism 23 further comprises a stop mechanism including an oblong hole 30 in the first gear wheel 24 and a corresponding stop pin 31 axially standing out from the internal body flange 29.
  • the hole length and the pin diameter define two stops, limiting the rotation stroke between the first gear wheel 24 and the steering column 3.
  • the spring 28 and the stop mechanism are designed in order to get a stressless state of the spring
  • the spiral spring 28 is maintained freely in a radial plane between the radial flange 29 and a washer 32 swaged at the internal body end, axially far from the instrument panel 1.
  • the computer can calculate the transmitted torque.
  • the calculated transmitted torque can drive the steering assistance power generator.
  • the transmitted torque is only used as a setting signal from the driver.
  • the spring 28 is designed to provide suitable resisting torque to give to the driver the information in return on the setting signal.
  • FIGS 1 and 5 illustrate a detection device 35 included in the instrumented bearing system 4.
  • a first coding ring 36 is secured onto the inner ring 17 of the internal bearing 12.
  • the first coding ring 36 is secured to the internal body 18 and to the steering column 3 which is a first rotating element 3.
  • a second coding ring 37 is secured through a mounting element to the outer ring 15 of the external bearing 10.
  • the second coding ring 37 is secured to the external body 16 and to the steering wheel 2, which is the second rotating element 2.
  • Both first and second rotating rings 36, 37 are magnetic circular rings with one North pole N 1 , N 2 and one opposite South pole S 1 , S 2 as illustrated in Figure 5.
  • the magnetic field of a particular part of a coding ring has a positive maximum value at the North pole and a negative maximum value at the opposite South pole.
  • the variation of the magnetic field along the coding ring depends on the angle of said particular part.
  • the detection device 35 further comprises an electronic circuit board 38 secured to the support element 8 by a rivet pin 39 or by any fixation means.
  • the circuit board 38 extents parallely to the support element 8 and the bearing plane 21.
  • the first coding ring 36 is always coaxial to the steering column 3 or to the first rotating element.
  • the second coding ring 37 is always coaxial to the steering wheel 2 or to the second rotating element.
  • the circuit board 38 comprises a first sensor 40 with two magnetic heads 40a, 40b secured on the circuit board 38.
  • the head 40a is located on a referenced axis 41 , passing by the two rotation axis 7, 14.
  • the other head 40b is located on another sensing axis, perpendicular to the reference axis 41 and crossing the rotation axis 14.
  • the two magnetic heads 40a, 40b are located radially outside of the first coding ring 36 at essentially the same distance from said coding ring 36.
  • the value of the magnetic field of a part of the first coding ring 36 located in front of the head 40a is proportional to cos(Ai), where Ai is the angle between the North pole Ni versus the reference axis 41.
  • the value of the magnetic field of the part in front of the head 40b is proportional to sin(Ai).
  • the detection device 35 further comprises a computer means, not shown on the drawings, and located on the circuit board 38.
  • the computer means receives signals from the two magnetic heads 40a, 40b and is able to calculate the absolute angle Ai of the rotating element within the range of [0,360°] .
  • the circuit board 38 comprises emitting means to transfer to an external computing means, the signals from the two sensing heads 40a, 40b.
  • the circuit board 38 further comprises a second sensor 43 which includes two magnetic heads 43a, 43b . Both heads 43a, 43b are located radially inside the second coding ring 37, at a short and essentially same distance from said second coding ring 37.
  • One head 43a is located on the same reference axis 41.
  • the other head 43b is located on a sensing axis, perpendicular to reference axis 41 and crossing the rotation axis 7 of the second rotating element 2.
  • the magnetic field detected by the head 43a is proportional to -cos(A 2 ), where A 2 is the absolute angle of the North pole N 2 versus the reference axis 41 .
  • the magnetic field detected by the other head 43b is proportional to +sin(A 2 ).
  • the same or another computer means receives the signals o f the two sensors heads 43a, 43b and calculates the angle A 2 within the range of [0,360°] .
  • the sensing heads of the first sensor 43 can have any position on the circuit board 38 , relatively to the position of the two heads of the second sensor 37.
  • a preferred position can be chosen to make the implementation of the fixation pillar 6 of the central block 5 easier.
  • the detection device measures both transmitted torque (M) and absolute angle (W 2 ) of the second rotating element within the range of 1 /K- l turns, where K is the rotation ratio of the gear mechanism 22.
  • the computer means calculates Ai and A 2 within the range of [0,360°] , and calculates Ai -K. A 2 , within the range of ⁇ a, where "a" is the half of the rotation stroke of the spring mechanism 23 as illustrated in Figure 7.
  • R is the elastic coefficient of the spring 28.
  • the computer means also calculate Ai -A 2 .
  • the absolute angle W 2 is within the range of [0,360°/(K- l )]
  • the absolute angle Wi of the steering column 3 is within the range of [0, (360° K/K- l ) ⁇ a]
  • the value of the difference Wi -W 2 is within the range of [0,360° ⁇ a] .
  • the value of Ai -A 2 gives to the computer means the indication of the number of rotations already made by the steering wheel 2.
  • the location of the second sensor, radially inside the corresponding coding ring provides a possibility to implement the second rotating element, radially outside the support element.
  • the instrumented bearing system is particularly compact in the axial direction and suitable for a steering mechanism.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Steering Mechanism (AREA)

Abstract

L'invention concerne un dispositif de détection (35) des paramètres de rotation d'un premier et second élément rotatif (3, 2) par rapport à un élément de support (8). Le dispositif comprend un premier anneau de codage (36), fixé de manière coaxiale au premier élément rotatif (3), et coopérant avec un premier capteur (40) fixé à l'élément de support (8), et un second anneau de codage (37), fixé de manière coaxiale au second élément rotatif (2), et coopérant avec un second capteur (43) fixé à l'élément de support (8). Ledit premier capteur (40) est situé radicalement à l'extérieur du premier anneau de codage (36). Ledit second capteur (43) est situé radicalement à l'intérieur du second anneau de codage (37).
PCT/EP2009/050162 2009-01-08 2009-01-08 Dispositif de détection de paramètres de rotation WO2010078963A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/050162 WO2010078963A1 (fr) 2009-01-08 2009-01-08 Dispositif de détection de paramètres de rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/050162 WO2010078963A1 (fr) 2009-01-08 2009-01-08 Dispositif de détection de paramètres de rotation

Publications (1)

Publication Number Publication Date
WO2010078963A1 true WO2010078963A1 (fr) 2010-07-15

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Application Number Title Priority Date Filing Date
PCT/EP2009/050162 WO2010078963A1 (fr) 2009-01-08 2009-01-08 Dispositif de détection de paramètres de rotation

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021005910A1 (de) 2021-11-26 2023-06-01 Kaco Gmbh + Co. Kg Einrichtung zur Erfassung wenigstens des Drehwinkels einer Welle, insbesondere einer Lenkwelle eines Fahrzeuges

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338559A2 (fr) * 1988-04-22 1989-10-25 Hitachi, Ltd. Dispositif pour la détection de torsions avec un signal de non-normalité
EP0859220A2 (fr) * 1997-02-14 1998-08-19 Alps Electric Co., Ltd. Détecteur de rotation pour codeur à rotations multiples
WO2002018878A2 (fr) * 2000-08-30 2002-03-07 Wabash Technologies, Inc. Systeme combine de capteur de vitesse de roue et de temperature de moyeu
DE10105824A1 (de) * 2001-02-07 2002-08-08 Mercedes Benz Lenkungen Gmbh Absolutwinkelsensor auf Wälzlagerbasis
GB2417564A (en) * 2004-08-27 2006-03-01 Kernow Instr Technology Ltd Determining angular and radial position of a rotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338559A2 (fr) * 1988-04-22 1989-10-25 Hitachi, Ltd. Dispositif pour la détection de torsions avec un signal de non-normalité
EP0859220A2 (fr) * 1997-02-14 1998-08-19 Alps Electric Co., Ltd. Détecteur de rotation pour codeur à rotations multiples
WO2002018878A2 (fr) * 2000-08-30 2002-03-07 Wabash Technologies, Inc. Systeme combine de capteur de vitesse de roue et de temperature de moyeu
DE10105824A1 (de) * 2001-02-07 2002-08-08 Mercedes Benz Lenkungen Gmbh Absolutwinkelsensor auf Wälzlagerbasis
GB2417564A (en) * 2004-08-27 2006-03-01 Kernow Instr Technology Ltd Determining angular and radial position of a rotor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021005910A1 (de) 2021-11-26 2023-06-01 Kaco Gmbh + Co. Kg Einrichtung zur Erfassung wenigstens des Drehwinkels einer Welle, insbesondere einer Lenkwelle eines Fahrzeuges

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