EP4025876A1 - Détection de déplacement et/ou de position par induction - Google Patents

Détection de déplacement et/ou de position par induction

Info

Publication number
EP4025876A1
EP4025876A1 EP20764067.3A EP20764067A EP4025876A1 EP 4025876 A1 EP4025876 A1 EP 4025876A1 EP 20764067 A EP20764067 A EP 20764067A EP 4025876 A1 EP4025876 A1 EP 4025876A1
Authority
EP
European Patent Office
Prior art keywords
coil
flux
group
elements
longitudinal direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20764067.3A
Other languages
German (de)
English (en)
Inventor
Ajoy Palit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP4025876A1 publication Critical patent/EP4025876A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2013—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2451—Incremental encoders
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2451—Incremental encoders
    • G01D5/2452—Incremental encoders incorporating two or more tracks having an (n, n+1, ...) relationship

Definitions

  • the invention relates to a sensor arrangement for detecting a displacement and / or a position along a longitudinal direction.
  • the sensor arrangement comprises a flux element group and a coil group as well as an evaluation device.
  • the sensor arrangement is designed in particular for a belt strap arrangement or a gearshift lever of an automatic transmission of a vehicle.
  • sensor arrangements are used here that are as compact as possible and can be integrated into an interior in a concealed manner.
  • derglei chen sensor assemblies are used in belt strap assemblies to determine the extension length of the belt.
  • Such sensor arrangements are also used in shift levers, in particular in automatic transmissions, in order to be able to determine a current shift lever position.
  • the invention is based on the object of improving the inductive determination of a displacement and / or position along a longitudinal direction.
  • the object is achieved by a sensor arrangement for detecting a displacement of a flow element group along a longitudinal direction, as well as by a belt assembly and a method according to claim 13.
  • a sensor arrangement for detecting a position in particular a position of a flow element group and / or a flow element along a longitudinal direction.
  • the sensor arrangement is designed in particular to detect a displacement of a flow element group and / or a flow element along a longitudinal direction. For example, a relative displacement of the flux element group and / or a flux element along a longitudinal direction relative to a coil group and / or flat coil can be determined by means of the sensor arrangement.
  • the sensor arrangement is designed for inductive detection of the displacement and / or position in the longitudinal direction.
  • the sensor arrangement is, for example, designed for a belt strap arrangement in a vehicle or a shift lever in a vehicle.
  • the sensor arrangement is designed to determine the position of a shift lever, in particular an automatic transmission gearshift, in particular whether N, P or D is selected.
  • the sensor arrangement can be designed to determine, based on the displacement of the flow element group, how far a belt of a belt webbing arrangement is pulled out.
  • the displacement in the longitudinal direction is, for example, a displacement along a non-curved path; alternatively, the displacement along a circular path or curvilinear path in the longitudinal direction can be determined by means of the sensor arrangement.
  • the sensor arrangement comprises the flux element group, a coil group and an evaluation device.
  • the coil group preferably forms a stationary coil group, for example arranged or can be arranged in a stationary manner in the environment, a component, housing or vehicle.
  • the flow element group is preferably a movable flow element group.
  • the coil group has at least two flat coils.
  • the coil group preferably comprises exactly two flat coils, alternatively three, four or more flat coils.
  • the flat coils of the coil group are preferably of the same type, for example with the same geometry and / or inductances.
  • the flat coils of the coil group can be designed differently, for example with different geometries and / or inductances.
  • the flat coils are arranged adjacent in the transverse direction.
  • the transverse direction is arranged transversely to the longitudinal direction.
  • the transverse direction is perpendicular to the longitudinal direction.
  • Flat coils are understood to be electrical coils that are flat.
  • the flat coils preferably lie with their flat extension in the plane transverse direction-longitudinal direction, which is spanned by the direction vectors in the longitudinal direction and transverse direction.
  • the flat coils are arranged directly next to one another in the direction of the transverse direction.
  • the coil group can comprise more than two flat coils, the more than two flat coils preferably being arranged next to one another in the transverse direction.
  • the flat coils can be designed as printed coils, for example.
  • the flat coils form single-layer coils.
  • the flat studies can form multilayer flat coils.
  • the flat coils preferably have a rectangular and / or square area and / or contour, this area in particular lying in the longitudinal direction-transverse direction plane.
  • the flow element group comprises at least two flow elements.
  • the flow element group comprises exactly two flow elements, alternatively more than two flow elements, for example five or ten flow elements.
  • the flow elements are preferably designed to be flat.
  • the flow elements have a rectangular, square, round or elliptical area.
  • the two-dimensional extension of the flow elements is in particular arranged in such a way that they lie parallel and / or in the same direction as the plane in the transverse direction and longitudinal direction.
  • the at least two flow elements are arranged offset to one another in the longitudinal direction and in the transverse direction.
  • the two flow elements are arranged adjacent to one another.
  • two adjacent flow elements are always arranged offset and / or displaced in relation to one another in the longitudinal direction and in the transverse direction.
  • the flux elements in the flux element group are arranged such that when the flux element group is arranged above the coil group, one flux element covers one of the at least two coils, the second coil not being covered by the adjacent flux elements, the covering being understood in the form of a projection becomes.
  • the flow elements are, for example, and / or comprise, for example, an electrically conductive material.
  • the flux elements can be designed to be ferromagnetic or diamagnetic. If the flow element group comprises more than two flow elements, there are a first and a second Flow element counted in the longitudinal direction offset from one another in the longitudinal direction and transverse direction device, wherein a third flow element, which follows the second flow element in the longitudinal direction, is only offset in the longitudinal direction with respect to the first flow element.
  • the flow element group defines and / or determines a flow element level.
  • the flow element level is the level in which all flow elements of the flow element group lie.
  • the flux element level can be understood as the level that is spanned by the flux elements that are currently parallel and / or minimally spaced from the coil group and / or coil level.
  • the coil plane is defined in particular by the coil group.
  • the coil plane is the plane in which the flat flat coils are arranged.
  • the coil plane is arranged at a distance from the flux element plane.
  • the coil plane and the flux element plane are arranged equidistantly and / or parallel to one another.
  • the coil plane and flux element plane are at least partially equidistant from one another and / or arranged parallel to one another, this section arrangement being in particular in the area of the flat coils.
  • the flux element group and the coil group are movable and / or displaceable relative to one another in the longitudinal direction.
  • the flux element group and / or the coil group can be moved in the longitudinal direction in a guided manner.
  • the movement of the flux element group relative to the coil group is specified and / or to be understood, for example, as trajectory.
  • the trajectory points in particular in the longitudinal direction and / or has only the longitudinal direction as the degree of freedom of movement.
  • the coil group is arranged stationary in the sensor arrangement and / or at its installation location, the flux element group being movable and / or displaceable in the longitudinal direction relative to the coil group.
  • the flow elements of the flow element group are re moved relative to the coil group and in particular to the flat coils.
  • the movement and / or the displacement of the flux element group and / or the flux elements cover and / or cover flat coils according to the current displacement of different flux elements and / or to different extents.
  • the flat tracks are designed and arranged in such a way that the current inductances of each flat coil is dependent on the displacement of the flux element group and / or that of the flux elements relative to the coil group.
  • a flat coil in the projection onto the coil plane is of different strength and / or is covered by a different number of flux elements.
  • the degree of coverage, coverage and / or a changed distance between a flux element and the flat coil influences and / or changes the current inductance of the flat coil. For example, induction of eddy currents in the flux element group and / or flux element leads to a change in the inductances of the respectively adjacent and / or inducing flat coils.
  • the evaluation device is designed and / or set up to determine and / or determine the current inductances for each flat coil.
  • the evaluation device is designed to electrically excite the flat coils with a frequency and to determine the current inductance based thereon.
  • the current inductances are different.
  • the evaluation device is designed to determine the displacement and / or the position in the longitudinal direction based on the current inductances of the flax pull, in particular all of the flat coils in the coil group or a subset of them. For example, by determining the current inductivities, the evaluation device is able to determine the relative position of the flux element group and coil group to one another, with the displacement and / or position in particular also being determinable on this determination.
  • the invention is based on the idea of not arranging coils of a coil group adjacent in the longitudinal direction, but in the transverse direction, so here I a particularly small coil group can be achieved.
  • the invention provides for the flux element group to be implemented in such a way that the offset arrangement of the flux elements in the transverse and longitudinal directions compensates for the arrangement of the coils in the transverse direction.
  • the flat coils each define a coil surface.
  • the coil area is understood to mean, in particular, the area, contour and / or shape of the area.
  • the flow elements each define a flow element area.
  • the coil area and the flux element area are in particular the areas which are parallel and / or in the same direction to the plane in the longitudinal direction and in the transverse direction.
  • the embodiment provides that the flux element surfaces and the coil surfaces are designed to be congruent and / or congruent.
  • the flux element areas and coil areas are designed as rectangles, especially squares.
  • Congruent is specifically understood to mean that when a flux element is arranged vertically above the coil surface and / or the flat coil, the coil surface and the flux element surface are and / or can be brought into congruence.
  • the flow element group has and / or comprises a plurality, in particular more than two, flow elements. It is provided that two adjacent flow elements are arranged offset in the longitudinal direction and in the transverse direction, with one flow element being arranged relative to the next but one flow element only in the longitudinal direction and without transverse offset. This refinement is based on the consideration of generating a zigzag-like structure of the flow elements in each case along the longitudinal direction in the flow element group. By moving and / or shifting the flux element group in the longitudinal direction, one of the two flat coils of the coil group is alternately covered, covered and / or its inductances influenced by a flux element.
  • the flow elements are arranged in the flow element group like a chessboard.
  • the flow element group is divided into two halves and / or sections in the transverse direction, with inside in the longitudinal direction of the halves and / or sections each flow elements are arranged alternately with a gap or no flow element.
  • the flow element group can be understood as a matrix with rows and columns, with flow elements and no flow elements or gaps being arranged alternately along the rows as well as along the columns.
  • No flow element can, for example, be an apprenticeship, a gap, air or carrier material.
  • the flow elements each have and / or define a measuring surface area.
  • the measuring surface area is the flat extension of the flux element, preferably parallel to the coil plane and in particular the metallic section of the flat extension.
  • the flow elements are arranged within the flow element group in such a way that, in the longitudinal direction, the measuring surface areas are not arranged so as to overlap but without gaps.
  • the flow elements are formed as rectangles, with 2 adjacent flow elements each contacting each other at the corner areas.
  • the flow elements are designed as flat metal elements.
  • the flat metal elements are metal platelets or metal foil sections.
  • the metal elements are made of brass, aluminum or iron.
  • the metal elements are designed as copper plates and / or copper foil sections.
  • the flow element group has a carrier.
  • the flow elements are, for example, printed, glued, twisted, woven, sewn or applied onto the carrier.
  • the carrier and the flow element are integrally connected to one another.
  • the carrier is preferably designed as a flat carrier, in particular extending in the longitudinal direction and transverse direction. It is particularly preferred that the carrier is flexible and / or pliable.
  • the carrier is designed as a film, plastic or metal foil.
  • the carrier can be designed to be rigid, for example as a plastic or metal plate.
  • the carrier forms a textile.
  • the carrier is designed as a knitted fabric or woven fabric.
  • the carrier can be designed as a belt strap.
  • the flat coils each have and define a winding plane.
  • the winding plane is directed in the same direction as the flux element plane.
  • the windings of the flat coil are arranged within the winding plane, for example as a helical winding and in particular as a square winding.
  • the coil group is designed and / or arranged to be stationary.
  • the coil group is arranged in a stationary and / or fixed manner in the sensor arrangement or in a housing of the sensor arrangement.
  • the flux element group, the carrier and / or the flux elements are designed to be movable and / or displaceable, in particular relative to the coil group, the flat coils and / or the housing of the sensor arrangement.
  • a further subject matter of the invention is a belt webbing arrangement for a vehicle, the belt webbing arrangement comprising a belt webbing and a coil group.
  • the coil group is in particular designed as described above and / or as in the sensor arrangement according to one of claims 1-11.
  • Flux elements are arranged, embossed, glued, printed or woven into the belt.
  • the webbing or the section above and / or parallel to the coil group defines the flux element level.
  • the flow elements are arranged on the belt in such a way that two adjacent flow elements are spaced apart from one another in the longitudinal direction and in the transverse direction.
  • the webbing forms a carrier ger as described for the sensor arrangement.
  • the belt strap is movable and / or displaceable relative to the coil group.
  • the belt strap can be moved and / or displaced relative to the coil group in the longitudinal direction.
  • flat coils of the coil group which are arranged in the transverse direction, are alternately covered and / or released by flux elements of the flux element group.
  • the flux elements and / or the flux element group influences the current inductances of the flat coils.
  • the belt arrangement comprises, in particular, an evaluation device as described above, in particular the evaluation device.
  • the evaluation device is designed to determine a displacement and / or position of the belt strap, the flux elements and / or flux element group in the longitudinal direction based on the measured current inductances.
  • the inductances of the at least two spaced flat coils in the transverse direction are determined, based on this determination, the arrangement and / or a degree of coverage of the elements can be determined, based on this, the extension length and / or position of the belt can be determined.
  • Another object of the invention is a method for determining a displacement and / or position in and / or along a longitudinal direction.
  • the process is designed to detect the displacement and / or the position by means of the sensor arrangement according to one of claims 1-11 and / or the belt strap arrangement.
  • the method provides that the current inductance is determined for each of the flat coils and the displacement and / or position is determined based on the current inductances determined.
  • Figure 1 shows a coil group
  • FIG. 2 shows a sensor arrangement as an exemplary embodiment of the invention
  • FIG. 3 shows the inductance curve of the flat coils from FIG. 2;
  • FIG. 4 shows a further exemplary embodiment of a sensor arrangement;
  • FIG. 5 Inductance curve for the sensor arrangement from FIG. 4.
  • FIG. 1 shows an exemplary embodiment of a coil group 1.
  • the coil group 1 comprises two flat coils 2a and 2b.
  • the coil group 1 and the flat coils 2a, 2b are flat and define a coil plane 3, the windings of the flat coils 2a, 2b lying in the coil plane 3.
  • directional vectors 4a and 4b are shown as an aid.
  • the longitudinal direction is oriented along the direction vector 4a, the transverse direction being perpendicular to the longitudinal direction and being represented by the direction vector 4b.
  • the coil plane 3 is directed in the same way as the plane spanned by the direction vectors 4a and 4b.
  • This plane, which is spanned by the direction vectors 4a and 4b, is also referred to as the plane longitudinal direction-transverse direction.
  • the flat coils 2a, 2b are arranged next to one another.
  • the flat coils 2a, 2b are arranged directly next to one another in the transverse direction.
  • the flat coils 2a, 2b divide the coil plane 3 in the transverse direction into two parts, also called lines 5a and 5b.
  • the division in the transverse direction by the flat coils 2a, 2b is a half division.
  • the flat coils 2a, 2b are thus designed to have the same area, in particular both with regard to the surface area and also with regard to the shape.
  • the flat coils 2a, 2b each have a contact 6, the contact 6 being used for contacting an evaluation device.
  • the evaluation device is designed to determine the respective inductances L, in particular current inductances L of the two flat coils 2a, 2b.
  • the physics and / or mathematics of an oscillating circuit are used to measure the interactivity L.
  • the flat coil 2a, 2b by means of the evaluation device via the Contact 6 energizes AC voltage of certain frequencies and determines the inductance L based on the reaction to it.
  • FIG. 2 shows an exemplary embodiment of a sensor arrangement 7.
  • the sensor arrangement 7 comprises the coil group 1 from FIG.
  • the sensor arrangement 7 comprises a flow element group 8.
  • the flow element group 8 comprises two flow elements 9a and 9b.
  • the flow elements 9a and 9b are designed as flat metallic elements.
  • the flow elements 9a and 9b are designed as copper plates.
  • the flux elements 9a and 9b are arranged adjacent to one another, in particular they contact one another in a contact area 10. The contact in the contact area 10 takes place at corner areas of the flux elements 9a and 9b.
  • the flow elements 9a and 9b are arranged in a common plane, the flow element plane 11.
  • the flux element plane 11 is arranged parallel to the coil plane 3. In particular, track plane 3 and flux element plane 11 are arranged parallel to one another.
  • the flow elements 9a and 9b are arranged offset from one another both in the longitudinal direction and in the transverse direction.
  • the arrangement of the flow elements 9a and 9b is in particular in the manner of a chessboard. In other words, the arrangement of the flow elements 9a and 9b can be viewed in particular as in the case of opposite windmill blades.
  • the flow element group 8 and the flow elements 9a and 9b are displaceable in the longitudinal direction. In particular, the shift takes place within the flux element plane and / or parallel to the coil plane 3. Moving the coil group 8 changes the coverage and / or coverage of the flat coils 2a, 2b by the flux elements 9a and 9b.
  • Covering and / or covering is understood to mean in particular the covering in a plan view from above, especially perpendicular to the coil plane 3, of the flat coils 2a, 2b by the flux elements 9a, 9b.
  • the flat coil 2a is completely covered and / or covered by the flux element 9a.
  • the flat coil 2b is neither covered by the flux element 9a nor by the flux element 9b.
  • the coverage of the flat coil 2a is reduced and the flat coil 2b is covered more and more by the flux element 9b.
  • the inductances of the flat coils 2a, 2b depend on the coverage and / or coverage from the flux elements 9a and 9b.
  • the cover of a flat coil 2a, 2b increases the current inductance L of the flat coil 2a, 2b. Accordingly, in the state shown, the measured current inductance Li of the flat coil 2a is greater than the current inductance l_2 of the flat coil 2b.
  • the position determination of the flux element 9a, 9b or the flux element group 8 can be determined by the evaluating device.
  • the evaluation device is designed to determine the displacement, for example as a displacement of the flux element group 8 relative to the coil group 1, based on this determination.
  • FIG. 3 shows, for the sensor arrangement 7 from FIG. 2, a measured and / or expected inductance profile for the two flat coils 2a, 2b.
  • the longitudinal displacement x of the flux element group 8 relative to the coil group 1 is plotted in millimeters along the abscissa. In particular, this corresponds to the displacement that is measured and / or to be determined.
  • the inductivities in nanohenry are plotted on the ordinate.
  • the illustration shows the inductances Li and L2.
  • the coverage of the flat coil 2a decreases, so that the current inductance Li of the technical school 2a decreases with increasing shift, whereas the flat coil 2b increases with increasing Displacement is covered more and more by the flow element 9b, so that this is a increasing inductance L2 is recorded.
  • the inductances Li and L2 are in opposite directions, so that the positioning of the flux element group relative to the coil group 1 can be determined by the evaluation device by measuring the current inductances Li, L2 of both flat coils 9a, 9b.
  • FIG. 4 shows an exemplary embodiment of a sensor arrangement 7, which in turn comprises two flat coils 2 a, 2 b in a coil group 1.
  • the coil group 1 is designed like the coil group from FIG. 1.
  • the flow element group 8 here comprises four flow elements 9a, 9b, 9c and 9d.
  • the flux elements 9a, 9b, 9c and 9d are arranged like a chessboard in the flux element plane, a plane parallel to the coil plane 3. Flux elements 9a, 9b, 9c and 9d each alternate with a gap within a row 5a, 5b. A gap in one row 5a, 5b corresponds in the other row 5b, 5a in the transverse direction with a flow element 9a, 9b, 9c and 9d.
  • each flat coil 2a, 2b is completely covered several times, here twice, and completely free ben.
  • the inductances Li, L2 pass through several minima and maxima, which are used for determining the position and / or determining the displacement by the evaluation device.
  • FIG. 5 shows the associated induction curve in the flat coils 2a, 2b for the sensor arrangement 7 from FIG. 4.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un agencement de capteur (7) pour détecter une position et/ou un déplacement d'un groupe d'éléments de flux (8) dans une direction longitudinale, ayant un groupe de bobines (1) et le groupe d'éléments de flux (8), le groupe de bobines (1) comprenant au moins deux bobines plates (2a, b), le groupe d'éléments de flux (8) comprenant au moins deux éléments de flux (9a, b), lesdits au moins deux éléments de flux (9a, b) étant agencés de manière adjacente l'un à l'autre dans la direction longitudinale et décalés dans la direction transversale, le groupe d'éléments de flux (8) et le groupe de bobines (1) étant mobiles et/ou aptes à être déplacés l'un par rapport à l'autre dans la direction longitudinale, les bobines plates (2a, b) étant conçues de telle sorte qu'une inductance actuelle (L1, L2) de chaque bobine plate (2a, b) est dépendante du déplacement actuel du groupe d'éléments de flux (8) par rapport au groupe de bobines (1), ayant un dispositif d'évaluation qui est conçu pour déterminer l'inductance actuelle (L1, L2) pour chaque bobine plate (2a, b) et pour déterminer le déplacement actuel sur la base des inductances actuelles déterminées (L1, L2).
EP20764067.3A 2019-09-04 2020-08-26 Détection de déplacement et/ou de position par induction Withdrawn EP4025876A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019213387.8A DE102019213387A1 (de) 2019-09-04 2019-09-04 Induktive Verschiebungs- und/oder Positionserfassung
PCT/EP2020/073814 WO2021043643A1 (fr) 2019-09-04 2020-08-26 Détection de déplacement et/ou de position par induction

Publications (1)

Publication Number Publication Date
EP4025876A1 true EP4025876A1 (fr) 2022-07-13

Family

ID=72266295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20764067.3A Withdrawn EP4025876A1 (fr) 2019-09-04 2020-08-26 Détection de déplacement et/ou de position par induction

Country Status (5)

Country Link
US (1) US20220316852A1 (fr)
EP (1) EP4025876A1 (fr)
CN (1) CN114364939A (fr)
DE (1) DE102019213387A1 (fr)
WO (1) WO2021043643A1 (fr)

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DE19749855A1 (de) * 1997-11-11 1999-06-02 Siemens Ag Verfahren zum Bestimmen des Abstandes zwischen einer angegurteten Person und einer Airbag-Einheit sowie Gurtabwickelmeßvorrichtung zur Verwendung für das Verfahren
DE60007202T2 (de) * 1999-03-15 2004-11-04 Goto, Atsutoshi, Fuchu Induktiver Stellungsdetektor
DE20011223U1 (de) * 2000-06-26 2000-10-05 Kindler Ulrich Vorrichtung zur berührungslosen Wegmessung, insbesondere zur Stellungs- und Bewegungserfassung
DE10119283A1 (de) * 2001-04-20 2002-10-24 Philips Corp Intellectual Pty System zur drahtlosen Übertragung elektrischer Leistung, ein Kleidungsstück, ein System von Kleidungsstücken und Verfahren zum Übertragen von Signalen und/oder elektrischer Leistung
DE10231980A1 (de) * 2002-07-15 2004-02-19 Schubach, Rudolf, Dipl.-Ing. Vorrichtung zum berührungslosen Messen einer linearen Verschiebung oder einer Drehlage
DE202008013715U1 (de) * 2008-10-16 2009-01-08 Sick Stegmann Gmbh Vorrichtung zur Bestimmung der relativen Position zweier zueinander bewegbarer Objekte
DE102008064544B4 (de) * 2008-12-19 2011-02-24 Balluff Gmbh Positions-/Wegmesssystem und Verfahren zur Bestimmung der Position eines Gebers
US9479134B2 (en) * 2013-03-04 2016-10-25 Texas Instruments Incorporated Position detecting system
DE102014212058A1 (de) * 2014-06-13 2015-12-17 Zf Friedrichshafen Ag Rückstelleinrichtung für einen Getriebe-Wählhebel
DE102015204052A1 (de) * 2015-03-06 2016-09-08 Robert Bosch Gmbh Wegsensor
DE102016204016A1 (de) * 2016-03-11 2017-09-14 Robert Bosch Gmbh Kipptoleranter Wegsensor
DE102017211493A1 (de) * 2017-07-06 2019-01-10 Robert Bosch Gmbh Drehwinkelsensoranordnung, LiDAR-System und Arbeitsvorrichtung

Also Published As

Publication number Publication date
US20220316852A1 (en) 2022-10-06
CN114364939A (zh) 2022-04-15
DE102019213387A1 (de) 2021-03-04
WO2021043643A1 (fr) 2021-03-11

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