WO2019016124A1 - Dispositif de détection - Google Patents

Dispositif de détection Download PDF

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Publication number
WO2019016124A1
WO2019016124A1 PCT/EP2018/069232 EP2018069232W WO2019016124A1 WO 2019016124 A1 WO2019016124 A1 WO 2019016124A1 EP 2018069232 W EP2018069232 W EP 2018069232W WO 2019016124 A1 WO2019016124 A1 WO 2019016124A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor device
sensor
module housing
shaft
partially
Prior art date
Application number
PCT/EP2018/069232
Other languages
German (de)
English (en)
Inventor
Dirk Rachui
Ekkehart Froehlich
Katalin Hadobas-Roessel
Jens Thom
Original Assignee
Valeo Schalter Und Sensoren Gmbh
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 Valeo Schalter Und Sensoren Gmbh filed Critical Valeo Schalter Und Sensoren Gmbh
Publication of WO2019016124A1 publication Critical patent/WO2019016124A1/fr

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Classifications

    • 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
    • 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
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
    • 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
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
    • 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
    • G01D5/142—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 using Hall-effect devices
    • G01D5/145—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 using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • 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
    • G01L3/104—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 permanent magnets
    • 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

Definitions

  • the present invention relates to a sensor device for detecting a rotational position of a shaft rotatable about a rotation axis, preferably a rotatable steering shaft of a motor vehicle, wherein the sensor device at least one sensor for receiving and forwarding the rotational position characterizing physical parameter, at least one transmitter for converting the of In a functional use state of the sensor device, the at least one sensor is arranged at least partially coaxial with the axis of rotation of the shaft in a region extending in the axial direction of the shaft, wherein the at least one transmitter at least is partially disposed within the electronics module housing, and wherein the electronics module housing, at least partially in the axial region, in which d it is arranged at least one sensor, is radially offset from the shaft.
  • Generic sensor devices in particular in the form of torque sensor devices and / or steering angle sensor devices for a steering shaft of a motor vehicle for detecting a torque applied to the steering shaft or an absolute rotational angle of the steering shaft, are basically known from the prior art.
  • motor vehicles they are mainly used to detect an applied by a driver on the steering shaft steering torque or an absolute angle of rotation of the steering shaft.
  • They are used in particular in electric steering systems in order to control the electric drive motor of the steering system based on a steering torque applied by the driver and / or as a function of the absolute angle of rotation, for example to be able to provide appropriate, situation-adapted steering assistance.
  • torque sensors are usually used in motor vehicles, which usually have a torsion bar with a defined, known torsional rigidity, the torsion bar connecting a first part of an axially divided shaft with a second part of the axially divided shaft. If a torque is applied to the shaft, this causes a rotation of the two parts of the shaft to each other by a measurable Angle of rotation, wherein the angle of rotation adjusts depending on the applied torque and the rigidity of the torsion bar, so that from the detected angle of rotation at a defined, known stiffness of the torsion bar, the applied torque can be determined.
  • a circumferential ring magnet usually designed as a permanent magnet
  • a stator with a stator are attached to the usually two magnetically conductive stator, rotatably connected to the second part of the shaft.
  • the stator device in particular the two stator elements, are usually arranged concentrically around the ring magnet of the magnet device in the radial direction with a small air gap.
  • the magnetic flux of the ring magnet of the magnet device in particular with the aid of additional components in the form of so-called flux guides, can be transmitted to the stator device, in particular the two stator elements, which generally have a section designed as a flux conductor, to form a magnetic sensor, for example a Hall sensor usually mounted on a circuit board and disposed within an electronics module housing, are forwarded and the signal generated can be evaluated to determine the applied torque.
  • a magnetic sensor for example a Hall sensor usually mounted on a circuit board and disposed within an electronics module housing
  • the magnetic flux density in the stator elements changes, which can be detected by means of the magnetic sensor.
  • the change in the magnetic flux density in the stator is inter alia dependent on the size of the relative movement of the ring magnet relative to the stator, ie from the angle of rotation.
  • Torsionssteifig- speed of the torsion bar the torque applied to the shaft.
  • a generic torque sensor device is known, for example, from EP 1 584 908 A2.
  • nearby external magnetic fields may cause interfering magnetic coupling with the sensor magnetic field, such as nearby electric motors or speakers.
  • the unwanted magnetic coupling with the external magnetic field which is not generated by the sensor device, can lead to an undesired change in the sensor magnetic field and thus undesired, erroneous sensor signals, which, however, appear plausible and therefore can not be recognized as faulty.
  • a steering angle sensor device is used in many cases, which can be arranged coaxially on the shaft and rotatably connected to the shaft main rotor, a mechanically with a constant and uniform first translation coupled to the main rotor coupled first secondary rotor, and a mechanically coupled with a constant and uniform second translation with the main rotor second secondary rotor, which is adapted to produce in a functional use state in response to a rotation angle of the first secondary rotor, a first sensor signal and as a function of a rotation angle of the second secondary rotor, a second sensor signal.
  • the secondary rotors are coupled with different ratios to the main rotor, so that from the detected rotational angles of the two secondary rotors, in particular according to the vernier principle, by means of an evaluation of the rotation angle of the shaft can be determined.
  • the two secondary rotors In order to generate the first and second sensor signals, the two secondary rotors generally each have a permanent magnet, by means of which the rotational movement of the shaft is in each case transferred to an associated magnetic sensor. can be carried, by means of which in each case the rotation of the associated secondary rotor can be detected.
  • Generic steering angle sensor devices are also basically known from the prior art, for example from DE 195 06 938 A1 or DE 10 2009 031 176 A1.
  • Associated methods for determining the absolute angle of rotation from at least the first sensor signal and the second sensor signal are likewise known in principle, for example from the first-mentioned DE 195 06 938 A1 or DE 101 10 785 A1.
  • an object of the invention to provide an alternative sensor device, preferably an improved sensor device, in particular a sensor device, which allows an improved magnetic shield to reduce interference by an external magnetic field, especially without an increased or with only a marginal increased space requirement.
  • the electronics module housing is designed for the at least partial magnetic shielding of the measuring sensor relative to an environment of the sensor device.
  • the invention allows in a functional condition of use, the at least partial magnetic shield of a coaxially arranged to the shaft sensor from radially offset from the shaft electronics module housing, in the case of a torque sensor device, for example, the at least partial shielding of a coaxial with the shaft and attached to the shaft ring magnet, and / or the at least partial shielding of a stator arranged coaxially with the shaft and fastened to the shaft and / or the at least partial shielding of at least one flux conductor arranged coaxially to the shaft.
  • the sensor is at least partially shielded from the environment in a sensor device according to the invention, an improved Decoupling of the environment can be achieved, since in particular an interaction with an external magnetic field reaching the measuring transducer can be reduced or even completely avoided, which has a particularly negative effect on the sensor signal quality.
  • Another advantage is that the shield of the sensor by the electronics module housing requires no additional space, since the shield can be realized with an electronics module housing with the same dimensions, as with a conventional, especially original, not designed for shielding electronic module housing.
  • a sensor is understood to mean a device which is designed to detect and forward at least one characterizing physical parameter.
  • At least one sensor has a magnetic device for generating a magnetic field as part of a magnetic sensor device, in particular a ring magnet of a torque sensor device, and / or a stator device for receiving and transmitting a magnetic flux of a magnetic field and / or at least one flux collector for collecting and forwarding the magnetic flux of a magnetic field and / or a rotor, in particular a main rotor of a steering angle sensor device, or by a magnetic device for generating a magnetic field as part of a magnetic sensor device, in particular a ring magnet of a torque sensor device, and / or a stator device for receiving and forwarding a magnetic flux of a magnetic field and / or at least one flux guide for collecting and forwarding the magnetic flux of a magnetic field and / or a R otor, in particular a main rotor of a steering angle sensor device formed.
  • a transmitter is understood to mean a device which is designed to detect the signal transmitted and relayed by the sensor, i. provided to convert physical parameters into an electrical measurement signal.
  • the transmitter is a magnetic sensor for generating a sensor signal, in particular Dependence on a state of a magnetic field generated by a magnetic device as a transmitter.
  • the electronics module housing is understood to be that housing and / or housing section of the sensor device which at least partially surrounds an area around the transmitter.
  • the housing and / or the housing section of the sensor device is understood, which receives and / or carries the transmitter, i. in which the transmitter is arranged, in particular is stored.
  • the transmitter can either directly, i. directly, without further components therebetween, be attached to the electronics module housing or else, which is a preferred embodiment, indirectly, preferably via a printed circuit board which directly, i. is stored directly in the electronics module housing, be stored in the electronics module housing and / or attached to the electronics module housing.
  • the transmitter is attached to or on a circuit board and it is mounted directly in a housing and / or a housing section, forms the housing and / or the housing portion in which the circuit board is mounted, the electronics module housing according to the invention.
  • a magnetic field is understood to be a magnetic field generated by a magnetic device of a sensor device.
  • the electronic module housing of a sensor device is designed according to the invention in particular to reduce and / or to avoid a disturbing magnetic coupling of a magnetic field generated by a magnetic device of a sensor device with an external magnetic field.
  • a magnetic device for generating a magnetic field and / or a Stator device and / or at least one flux guide is or has the shielding achieved in this way can already be sufficient to generate the required sensor signal quality.
  • a sensor device according to the invention with a magnetically shielding electronic module housing makes it possible to reduce the negative influence of external magnetic fields on the sensor and thus to reduce the sensor signal to an acceptable level and / or even to prevent it in some cases.
  • the at least one sensor is at least partially, preferably almost completely, in particular completely outside the electronics module housing, in particular outside a volume surrounding the electronic module housing.
  • the electronics module housing for at least partial magnetic shielding of the at least one, at least partially disposed within the electronics module housing transmitter relative to the environment of the sensor device is formed.
  • the inventive shielding of the sensor by means of the electronic module housing can in many cases a further improved shielding against external magnetic fields, as they may occur in the immediate vicinity of a sensor device according to the invention, in particular in a vehicle, and thus an improved sensor signal quality can be achieved.
  • the at least one transmitter of the sensor device at least one at least partially, preferably completely, disposed within the electronic module housing magnetic sensor and the at least one sensor at least one magnetic field generating device and / or at least one Magnetzierleitleaned and / or at least one Magnet.
  • the at least one magnetic field generating device and / or the at least one magnetic flux conducting device and / or the at least one magnetic flux collecting device is arranged at least partially outside the electronic module housing and is at least partially magnetically shielded by the electronics module housing relative to the surroundings of the sensor device.
  • the electronic module housing is formed at least in two parts and has at least a lower housing portion, in particular a housing lower part, and a lid portion, in particular a housing cover, wherein at least the lid portion, in particular the housing cover, at least partially magnetic shielding at least a measuring sensor and / or at least one transmitter is formed with respect to the surroundings of the sensor device.
  • at least the housing cover of the electronic module housing preferably has a shielding effect.
  • the electronics module housing has at least one shielding element, preferably at least one planar shielding element.
  • a shielding element in the sense of the invention is understood to be an element and / or a component and / or a device with which a magnetic shield can be effected in relation to an external magnetic field present in the environment, i. with which a reduction of a disturbing magnetic coupling with an external magnetic field located in the environment can be effected.
  • At least one shielding element is preferably a shielding plate made of ferromagnetic material or has at least one shielding plate of ferromagnetic material.
  • at least one shielding element can also be made of plastic or have plastic, wherein the plastic is filled with shielding particles, in particular with ferromagnetic particles, wherein preferably at least one shielding element contains iron and / or nickel and / or iron-containing and / or nickel-containing particles ,
  • the shielding element shields at least one sensor and / or at least one transmitter of the sensor device in at least one direction at least partially axially and / or partially radially magnetically relative to the surroundings of the sensor device.
  • the at least one shielding element is connected to the electronics module housing and preferably extends outwardly away from the electronics module housing in the direction of the shaft, in particular in the radial direction to the shaft, based on the axis of rotation of the shaft.
  • the at least one shielding element is preferably connected to the cover section, in particular on the housing cover, of the electronics module housing, and in particular integrally connected thereto.
  • the shielding element preferably extends away from the cover section, in particular in the direction of the lower housing section, preferably past the lower housing section, in particular overlapping the lower housing section and beyond the lower housing section.
  • the electronics module housing can also have at least one shielding element connected to the lower housing section, which is preferably flat.
  • the shielding element can be formed integrally with the electronic module housing, wherein the shielding element is preferably molded onto the electronics module housing.
  • the shielding element may be made of a different material than the rest of the electronics module housing or of the same material.
  • the shielding element can also be formed integrally with the electronics module housing, that is to say be manufactured in particular as a 1-component plastic injection-molded part. If the shielding element, which is designed to magnetically shield at least one further component of the sensor device, is made of a different material than the electronics module housing, it preferably forms a two-component injection-molded component with the electronics module housing.
  • the electronics module housing is at least partially lined from the inside with at least one shielding element. That is to say, preferably at least one shielding element is arranged within the electronics module housing, and in particular is arranged and / or fastened to an inner wall of the electronics module housing. This allows a simple way a magnetic shielding within the Electronic module housing arranged transmitter can be achieved with respect to an external magnetic field.
  • the electronics module housing has at least one inner housing part and an outer, at least partially surrounding the inner housing part housing shell, wherein preferably the outer housing shell for magnetic shielding at least one sensor and / or a transmitter of the sensor device is formed and in particular is slipped over the inner housing part in the radial direction.
  • the electronics module housing contains ferromagnetic material and / or consists thereof, preferably iron-containing and / or nickel-containing material, in particular steel and / or ferrous and nickel-containing material.
  • the electronics module housing contains a plastic with magnetically shielding particles or is made of a plastic with magnetically shielding particles, wherein the plastic is preferably filled with iron and / or nickel-containing particles, in particular with ferromagnetic particles.
  • the electronic module housing is a plastic injection molded part and produced by injection molding.
  • the plastic may also be filled with other particles which also have a shielding effect.
  • an improved sensor device can be provided in a particularly simple manner.
  • a conventional electronics module housing can be replaced without much effort by an electronics module housing having an inventive, magnetically shielding effect.
  • With a suitable selection of the plastic may not even a structural change of the electronics module housing may be required.
  • an improved sensor device in particular a sensor device with improved shielding can be provided.
  • the electronic module housing is formed at least in two parts, preferably at least the cover section, in particular the housing cover, in particular made of a plastic with magnetically shielding acting particles, in particular ferromagnetic particles, or contains such a plastic.
  • the sensor device comprises a torque sensor device with a sensor for detecting a torque applied to the rotatable shaft, in particular a torque sensor device for determining a torque applied to a steering shaft of a motor vehicle, wherein the rotatable shaft has a first part shaft and a second partial wave, which are coupled together by means of a torsion bar, wherein the torque sensor device is adapted to detect the relative rotational position of the two partial shafts to each other and to determine depending on the relative rotational position of the two partial waves, the torque applied to the rotatable shaft, preferably the sensor of the torque sensor device is at least partially shielded magnetically by the electronics module housing from an environment of the sensor device.
  • the sensor of the torque sensor device comprises a multi-pole ring magnet and two stator rings made of a soft magnetic material, wherein in a functional use state of the sensor device, the ring magnet is rotatably coupled to the first part shaft and the stator rotatably coupled to the second part shaft are and are adapted to independently record and forward a magnetic flux generated by a magnetic field of the ring magnet independently of each other and in each case in the circumferential direction of the ring magnet.
  • the ring magnet and the stator rings are preferably at least partially, in particular almost completely, outside the electronics module housing and are in particular at least partially shielded by the electronics module housing from magnetic surroundings of the sensor device.
  • the sensor of the torque sensor device has at least one flux guide for collecting the magnetic flux generated by the magnetic field of the ring magnet and received by the stator, wherein in particular the at least one flux conductor of the sensor of the torque sensor device at least partially by means of the electronics module housing opposite an environment of the sensor device is magnetically shielded, wherein preferably at least partially, in particular almost completely, outside of the electronics module housing at least one flux guide.
  • the magnetic shield of the torque sensor device can be further improved.
  • the torque sensor device comprises a magnetic sensor as a transducer by means of which preferably the magnetic flux generated, recorded and forwarded and in particular collected magnetic flux is converted into an electrical signal
  • the transmitter of the torque sensor preferably at least partially within the Electronic module housing is arranged, in particular completely, wherein preferably the transmitter of the torque sensor device is at least partially shielded by the electronics module housing magnetically against an environment of the sensor device.
  • At least one flux conductor of the torque sensor device is at least partially shielded from the surroundings of the sensor device by at least one shielding element of the electronics module housing.
  • the respective shielding element preferably extends in each case over a region of the flux guide, in particular over the region of the flux guide to be shielded, the flux guide preferably having a flux guide body and at least one flux guide tab, the flux guide tab being arranged in particular opposite the magnetic sensor of the torque sensor device, and wherein the flux guide in particular in the area of the flux conductor tab and / or in a connection region of the flux conductor body around the flux conductor tab, the shielding element is at least partially magnetically shielded from the environment of the sensor device.
  • the Flußleiterlasche can also be omitted or replaced by a separate coupling element, depending on the available space and existing mounting options.
  • the shielding element extending outside of the electronics module housing magnetically shields at least part of the flux guide and / or the coupling element in the region of the magnetic sensor from the surroundings of the sensor device.
  • a sensor device may comprise one or more further sensors and / or sensor devices, wherein a sensor device according to the invention preferably additionally comprises a steering angle sensor device, in particular a steering angle sensor device which has a rotor and an angle sensor device.
  • a sensor device preferably additionally comprises a steering angle sensor device, in particular a steering angle sensor device which has a rotor and an angle sensor device.
  • Steering angle sensor devices are basically known from the prior art, to which reference is therefore made in this regard for more information on the design of possible steering angle sensor devices.
  • steering angle sensor devices with a gear for detecting a rotational angle of the rotor, as they are known for example from DE 10 2008 01 1 448 A1 or DE 195 06 0938 A1 or DE 199 62 241 A1.
  • the sensor device has a steering angle sensor device for determining a rotational angle of the rotatable shaft, in particular a steering angle sensor device for determining the rotational angle of a shaft of a motor vehicle, wherein the steering angle sensor device has at least one main rotor, in particular at least one main gear as a sensor, wherein is arranged coaxially and rotationally fixed to the shaft in a functional use state of the sensor device, the main rotor.
  • the main rotor is in particular at least partially, in particular almost completely, outside the electronics module housing.
  • the steering angle sensor device has a measuring transducer, which has at least one secondary rotor, in particular at least one secondary gear, with at least one rotatably mounted on the secondary rotor magnetic element and at least one, cooperating with the non-rotatably mounted on the secondary rotor magnetic element magnetic sensor, wherein the Transmitter of the steering angle sensor device is adapted to generate an electrical signal depending on the rotational position of the shaft, and wherein the transmitter of the steering angle sensor device is preferably at least partially, in particular completely, disposed within the electronics module housing, wherein preferably the transmitter of the torque sensor device at least partially by the electronic module housing is magnetically shielded from an environment of the sensor device.
  • the sensors of the steering angle sensor device in particular their magnetic sensors, thereby also at least partially, preferably completely disposed within the electronics module housing, these can also due to the inventive design of the sensor device and without additional measures against a located in the environment of the sensor device, external magnetic field to simple Art are at least partially shielded magnetically.
  • a sensor device according to the invention may comprise further shielding measures, such as one or more additional, the sensor device, in particular the electronic module in the region of the magnetic sensor, at least partially surrounding shielding.
  • a sensor device according to the invention can also be almost completely encapsulated by an additional shielding.
  • FIG. 1 a shows a first exemplary embodiment of a sensor device according to the invention in an exploded view
  • FIG. 1 b shows the sensor device according to the invention from FIG. 1 a in a functional assembly state
  • FIG. 2a shows a second embodiment of a sensor device according to the invention, also in exploded view
  • FIG. 2b shows the sensor device according to the invention from FIG. 2a in a functional assembly state
  • FIG. 3a shows a third embodiment of a sensor device according to the invention, partially in exploded view
  • Fig. 3b the sensor device according to the invention of Fig. 3a in a functional assembly state.
  • FIG. 1 a shows an exploded view of a first exemplary embodiment of a sensor device 10 according to the invention, the sensor device 10 having a torque sensor device which essentially has the same design as in DE102016124370.1 is described, which is hereby explicitly referred to for further, not described in detail below details.
  • the sensor device 10 has an upper part with an electronic module housing 7 and a lower part with a further housing 20 and a torque sensor device received therein and not further described.
  • the electronics module housing 7 is formed in two parts and has a housing cover 1 and a housing lower part 6 and is for receiving and supporting a printed circuit board 2 with the electronic components attached thereto, in particular the attached magnetic sensors 3 and 4, which serve as a transmitter, as well as for receiving two Coupling elements 5 formed, whose function will be explained later.
  • the electronic module housing 7 can, based on the representation in Fig. 1 a, placed from above on the other housing 20 and fixed to this, in particular four, locked in each case with provided in the corners of the housing base 6 and housing cover 1 recesses locking elements latched become.
  • the torque sensor device 10 has a sensor which has as essential elements a magnetic device 31 and a stator 33 and two flux conductors 32A and 32B, which in this embodiment of a sensor device 10 according to the invention in the axial direction at least partially into an inventive further housing 20, in particular an axial passage opening of the housing 20 are inserted and fixed in the housing 20, wherein the two flux conductors 32A and 32B are encapsulated in this case by the housing 20 and thereby fixed therein, while the magnetic means 31 and the stator 33 each rotatable relative to the other Housing 20 are disposed within the housing 20.
  • the sensor device 10 according to the invention shown in FIG. 1 a is designed for connection to a shaft, not shown here, in particular a split steering shaft, divided into a first part and a second part, wherein the first part of the shaft and the second part of the wave in axial direction by means of a torsion bar with known, defined torsional stiffness are interconnected, so that the first part of the shaft and the second part can be rotated against each other when a torque is applied to the shaft.
  • the thereby adjusting torsion angle is a suitable torsion bar proportional to the torque applied to a suitable torsion bar, so that you can infer the torque, if one detects the applied angle of rotation and knows the torsional stiffness of the torsion bar.
  • the sensor device 10 or in particular the torque sensor device 10 is designed to detect the angle of rotation and to generate a sensor signal which is dependent on the angle of rotation and in particular proportional to the angle of rotation.
  • the torque sensor device 10 the magnetic device 31, which arranged by means of a sleeve 31 B coaxial with the shaft and rotatably connected to the first part of the shaft can be connected.
  • a ring magnet 31 A is fixed, which can be arranged in the axial direction concentric with the stator 33 with a defined gap therebetween.
  • the stator device 33 which likewise forms part of the sensor of the torque sensor device, can have a sleeve-shaped, unspecified portion of a stator holder, not shown, to which the individual elements of the stator 33 are attached and which are each fixed by means of fixing rings in the axial direction the second part of the shaft rotatably secured.
  • the two stator elements of the stator 33 are made of a soft magnetic material, in particular made of soft magnetic metal, adapted to receive the magnetic flux of the magnetic field generated by the ring magnet 31 A, in particular together and forward.
  • the sensor device 10 according to the invention or the torque sensor device 10 each in a Functional state of use of the sensor device 10 according to the invention each encompass an adjacent stator element of the stator device 33 in the circumferential direction (see Fig. 1 a).
  • the two flux conductors 32A and 32B each have an annular flux conductor body, which is formed circumferentially and serves essentially to receive the magnetic flux collected by the adjacent stator element and to forward it to the respective magnetic sensor 3 or 4 of the torque sensor device.
  • the flux guide bodies of the flux conductors 32A and 32B have no flux guide tabs extending radially upward toward the magnetic sensors 3 and 4, however, this is possible in an alternative embodiment of a torque sensor device of a sensor device according to the invention and may be particularly advantageous in some cases since this makes possible a further radial arrangement within the electronic module housing, in particular in the region of the housing cover 1, as a result of which, in some cases, improved shielding may be achieved under some circumstances.
  • coupling elements 5 are inserted into the lower housing part 6, which likewise consist of soft-magnetic material and have a function similar to a Flußleiterlaschen.
  • the two magnetic sensors 3 and 4 of the torque sensor device or of the sensor device 10 are fastened to the printed circuit board 2, in particular on the underside thereof, wherein the printed circuit board 2 can be received by the lower housing part 6 (see Fig. 2a) and in particular from above on the lower housing part 6 can be plugged.
  • the printed circuit board 2 can be received by the lower housing part 6 (see Fig. 2a) and in particular from above on the lower housing part 6 can be plugged.
  • two unspecified, upwardly projecting pins are provided for positioning the printed circuit board 2 in the electronic module housing 7.
  • the electronics module housing 7 is at least partially in the axial region in which the sensor is arranged, i. in the axial direction at least partially at the height of the magnet device 31, the stator device 33 and / or the flux conductors 32A and 32B, wherein the electronics module housing is arranged radially offset from the shaft.
  • the two magnetic sensors 3 and 4 are located in the axial direction between the two upper ring segment portions of the flux conductors 32A and 32B (see Fig. 2a), so that a flux collected by the flux conductors 32A and 32B may be transmitted to the magnetic sensors 3 and 4, respectively ,
  • the electronic module housing 7 is designed for at least partial magnetic shielding of the sensor, wherein in this embodiment, in particular the two flux conductors 32A, 32B are at least partially magnetically shielded from the surroundings of the sensor device 10, in particular in the area around the two magnetic sensors 3 and 4, ie in the area of the transducers.
  • the electronic module housing 7, in particular the housing lower part 6, extends in the radial direction inwards, i. in the direction of the shaft or to the axis of rotation of the shaft.
  • the electronics module housing 7 is made of a plastic filled with iron-containing and / or nickel-containing particles.
  • the electronics module housing 7, in particular its housing cover 1 and the housing lower part 6, are each made as a plastic injection molded parts from the previously described, iron and / or nickel-containing plastic.
  • the sensor device 10 allows in a simple manner, in particular without extensive changes of a constructive nature, in particular without additional space requirements, at least partial shielding of the sensor of the torque sensor device 10, in particular in the range of serving as a transmitter magnetic sensors 3 and 4.
  • a disturbing , Magnetic coupling between the sensor with an external magnetic field located in the vicinity of the sensor device such as may be caused by a nearby electric motor, nearby high-current lines or a nearby speaker, reduced or even completely avoided.
  • the entire electronic module housing 7 is produced from a plastic filled with magnetically shielding particles, magnetic shielding of the components arranged inside the electronics module housing 7, for example by the magnetic sensors 3 and 4 serving as transmitters, can also be achieved.
  • a or a plurality of shielding elements in particular correspondingly designed shielding plates, preferably made of an iron and / or nickel material, and / or iron and / or nickel-containing material, be provided, in particular arranged to a further improved shielding of the sensor device 10, in particular a further improved shielding serving as a transmitter magnetic sensors 3 and 4, to achieve.
  • Fig. 2a shows a second embodiment of a sensor device according to the invention 10 ', which is also a torque sensor device 10' and which is basically similar to the described with reference to FIGS. 1 a and 1 b torque sensor device constructed and formed.
  • the printed circuit board 2 is received by the electronic module housing 7 ', in particular by the lower housing part 6, and is mounted in the electronic module housing 7'. Furthermore, with reference to FIG. 2 a, it is conceivable that the magnetic sensors 3 and 4 are at least partly, in particular almost almost completely, surrounded by the electronics module housing 7 'in a functional state of use of the sensor device 10'.
  • the electronics module housing 7 ' is also made in this embodiment of a filled with ferrous and / or nickel-containing plastic, so that in this embodiment, the flux conductors 32A and 32B as part of the sensor at least partially and serving as a transmitter magnetic sensors 3 and 4 through the Electronic module housing 7 'can be magnetically shielded against a magnetic field located in the vicinity of the sensor device 10' external magnetic field.
  • the housing cover 1 'of the sensor device 10' according to the invention from FIGS. 2 a and 2 b additionally comprises two planar shielding elements 1 A and 1 B, with which a larger area and thus improved shielding of the sensor of the sensor device 10 'in the axial direction can be achieved compared to the previously described embodiment of a sensor device 10 according to the invention.
  • the two shielding elements 1 A and 1 B are integral, ie produced in one piece, with the remaining part of the housing cover 1 ', in particular made from the same material, ie also from a plastic filled with iron and nickel-containing particles, in particular Injection molding process together with the housing cover 1 '.
  • the flat shielding elements 1 A and 1 B each extend in the radial direction inwardly away from the housing cover 1 ', in particular in the direction of the lower housing portion 6, the lower housing portion 6 overlapping and past this, so that they each in the radial direction inwards beyond the lower housing section 6 protrude.
  • the flux conductors 32A and 32B can also be shielded over a relatively large area at least partially against an interfering magnetic coupling of the surroundings with an external magnetic field, in particular in the axial direction.
  • the stator device 33 and the magnetic device 31 can be at least partially, in particular in the axial direction, shielded.
  • an improved magnetic shielding can be achieved compared with the previously described embodiment of a sensor device 10 according to the invention.
  • FIG. 3a and 3b show a third embodiment of a sensor device 10 "according to the invention, wherein the sensor device 10" in Fig. 3a is shown in a partially exploded view and in Fig. 3b in a functional assembly state.
  • This third exemplary embodiment of a sensor device 10 "according to the invention is based on the sensor device 10 from FIGS. 1 a and 1 b, that is to say in the first exemplary embodiment of a sensor device 10 according to the invention.
  • the electronic module housing 7 "of the sensor device 10" in addition to an outer shell 8, which also acts magnetically shielding and in the radial direction on the housing cover 1 and the lower housing part 6, which in this case form an inner housing part, slipped can or is.
  • the housing shell 8 is designed such that it surrounds the housing cover 1 except from the radial inside forth from all sides, ie on five sides to the side of the shaft ago, in particular encapsulates, and beyond in the radial Direction extends approximately to the height of the axis of rotation of the shaft and also laterally, ie in the axial direction.
  • the sensor device 10 is in a functional use condition from the housing cover 1 to approximately to a maximum diameter of the sensor housing 20, that is approximately up to the level of the axis of rotation of the shaft, within the housing shell eighth
  • the housing shell 8 is likewise produced from a plastic filled with iron and / or nickel-containing particles by injection molding.

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

Abstract

L'invention concerne un dispositif de détection (10) destiné à détecter une position de rotation d'un arbre pouvant tourner autour d'un axe de rotation, de préférence d'un arbre de direction rotatif d'un véhicule automobile. Le dispositif de détection (10) possède au moins un capteur de mesure (31, 33, 32A, 32B) destiné à acquérir et à retransmettre un paramètre physique qui caractérise la position de rotation à détecter, au moins un convertisseur de mesure (3, 4) destiné à convertir le paramètre physique fourni par le capteur de mesure (31, 33, 32A, 32B) en un signal de mesure électrique, et un boîtier de module électronique (7). Dans un état d'utilisation conforme à sa fonction du dispositif de détection (10), l'au moins un capteur de mesure (31, 33, 32A, 32B) est disposé de manière au moins partiellement coaxiale par rapport à l'axe de rotation de l'arbre dans une zone qui s'étend dans la direction axiale de l'arbre et l'au moins un convertisseur de mesure (3, 4) au moins partiellement à l'intérieur du boîtier de module électronique (7). Le boîtier de module électronique (7) est disposé avec un décalage radial par rapport à l'arbre, au moins partiellement dans la zone axiale dans laquelle est disposé l'au moins un capteur de mesure (31, 33, 32A, 32B). L'invention est caractérisée en ce que le boîtier de module électronique (7) est configuré pour réaliser un blindage magnétique au moins partiel de l'au moins un capteur de mesure (31, 33, 32A, 32B) par rapport à un environnement du dispositif de détection (10).
PCT/EP2018/069232 2017-07-21 2018-07-16 Dispositif de détection WO2019016124A1 (fr)

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DE102017116454.5A DE102017116454A1 (de) 2017-07-21 2017-07-21 Sensorvorrichtung

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DE102020117041A1 (de) 2020-06-29 2021-12-30 Valeo Schalter Und Sensoren Gmbh Sensorvorrichtung zum Erfassen eines Drehens einer Welle um eine Drehachse
WO2022023179A1 (fr) * 2020-07-28 2022-02-03 Zf Friedrichshafen Ag Système de direction et module capteur de système de direction

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DE102019112422A1 (de) 2019-05-13 2020-11-19 Schaeffler Technologies AG & Co. KG Lenkmomentensensoranordnung
DE102021200207B3 (de) 2021-01-12 2022-03-31 Thyssenkrupp Ag Lenksystem mit abgeschirmter magnetischer Drehmomentsensorvorrichtung
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WO2023025380A1 (fr) * 2021-08-25 2023-03-02 Thyssenkrupp Presta Ag Dispositif de capteur pour un système de direction de véhicule automobile, système de direction pour un véhicule automobile et procédé de fabrication d'un dispositif de capteur

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CN113498476A (zh) * 2019-03-01 2021-10-12 蒂森克虏伯普利斯坦股份公司 包括磁屏蔽罩的扭矩传感器单元
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WO2022023179A1 (fr) * 2020-07-28 2022-02-03 Zf Friedrichshafen Ag Système de direction et module capteur de système de direction

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