EP4025876A1 - Inductive displacement and/or position detection - Google Patents

Inductive displacement and/or position detection

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Withdrawn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)
French (fr)
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/en
Withdrawn legal-status Critical Current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.

Abstract

The invention relates to a sensor arrangement (7) for detecting a position and/or a displacement of a flux element group (8) in a longitudinal direction, having a coil group (1) and the flux element group (8), wherein the coil group (1) comprises at least two flat coils (2a, b), wherein the flux element group (8) comprises at least two flux elements (9a, b), the at least two flux elements (9a, b) being arranged adjacent to each other in the longitudinal direction and offset in the transverse direction, the flux element group (8) and the coil group (1) being movable and/or displaceable relative to each other in the longitudinal direction, wherein the flat coils (2a, b) are designed such that a current inductance (L1, L2) of each flat coil (2a, b) is dependent on the current displacement of the flux element group (8) relative to the coil group (1), having an evaluating device which is designed to determine the current inductance (L1, L2) for each flat coil (2a, b) and to determine the current displacement on the basis of the determined current inductances (L1, L2).

Description

Induktive Verschiebunqs- und/oder Positionserfassung Inductive displacement and / or position detection
Die Erfindung betrifft eine Sensoranordnung zur Erfassung einer Verschiebung und/oder einer Position entlang einer Längsrichtung. Die Sensoranordnung umfasst eine Flusselementgruppe und eine Spulengruppe sowie eine Auswerteeinrichtung. Die Sensoranordnung ist insbesondere für eine Gurtbandanordnung oder einen Schalthebel einer Automatikschaltung eines Fahrzeugs ausgebildet. 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.
Die Erfassung einer Längsverschiebung und/oder einer Position in Längsrichtung wird in vielen technischen Gebieten, insbesondere im Automobilbereich, benötigt. Vorzugsweise werden hier Sensoranordnungen verwendet, die möglichst kleinbau end und verdeckt in ein Interieur integrierbar sind. Beispielsweise werden derglei chen Sensoranordnungen in Gurtbandanordnungen eingesetzt, um die Auszugs länge des Gurtes zu bestimmen. Ferner finden derartige Sensoranordnungen in Schalthebeln, insbesondere von Automatikgetrieben, ihren Einsatz, um eine aktuelle Schalthebelstellung bestimmen zu können. The detection of a longitudinal displacement and / or a position in the longitudinal direction is required in many technical fields, in particular in the automotive sector. Preferably, sensor arrangements are used here that are as compact as possible and can be integrated into an interior in a concealed manner. For example, 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.
In der Veröffentlichung „ Frequency Response Modeling of Inductive Position Sensor with Finite Element Tools“ von A. K. Palit, https://www.comsol.de/paper/frequencv- response-modeling-of-inductive-position-sensor-with-finite-element-too-18933 (abge rufen am 28.8.2019) ist ein induktiver Sensor zur Verschiebungsbestimmung in Längsrichtung offenbart. In the publication "Frequency Response Modeling of Inductive Position Sensor with Finite Element Tools" by AK Palit, https://www.comsol.de/paper/frequencv- response-modeling-of-inductive-position-sensor-with-finite- element-too-18933 (accessed on August 28, 2019) discloses an inductive sensor for determining displacement in the longitudinal direction.
Der Erfindung liegt die Aufgabe zugrunde, die induktive Bestimmung einer Verschie bung und/oder Position entlang einer Längsrichtung zu verbessern. The invention is based on the object of improving the inductive determination of a displacement and / or position along a longitudinal direction.
Die Aufgabe wird gelöst durch eine Sensoranordnung zur Erfassung einer Verschie bung einer Flusselementgruppe entlang einer Längsrichtung, sowie durch eine Gurt bandanordnung und ein Verfahren gemäß Anspruch 13. Bevorzugte und/oder vorteil hafte Ausführungsformen der Erfindung ergeben sich aus den Unteransprüchen, der Beschreibung sowie den beigefügten Figuren. Die Erfindung betrifft eine Sensoranordnung zur Erfassung einer Position, insbeson dere einer Position einer Flusselementgruppe und/oder eines Flusselementes ent lang einer Längsrichtung. Die Sensoranordnung ist insbesondere zur Erfassung eine Verschiebung einer Flusselementgruppe und/oder eines Flusselements entlang einer Längsrichtung ausgebildet. Beispielsweise kann mittels der Sensoranordnung eine relative Verschiebung der Flusselementgruppe und/oder eines Flusselementes ent lang einer Längsrichtung relativ zu einer Spulengruppe und/oder Flachspule be stimmt werden. Die Sensoranordnung ist zur induktiven Erfassung der Verschiebung und/oder Position in Längsrichtung ausgebildet. Die Sensoranordnung ist beispiels weise für eine Gurtbandandanordnung in einem Fahrzeug oder einen Schalthebel in einem Fahrzeug ausgebildet. Beispielsweise ist die Sensoranordnung ausgebildet, die Stellung eines Schalthebels, insbesondere einer Automatikgetriebeschaltung, zu bestimmen, im Speziellen ob N, P oder D gewählt ist. Ferner kann die Sensoranord nung ausgebildet sein, basierend auf der Verschiebung der Flusselementgruppe zu bestimmen, wie weit ein Gurt einer Gurtbandanordnung ausgezogen ist. Die Ver schiebung in Längsrichtung ist beispielsweise einer Verschiebung entlang einer un gekrümmten Bahn, alternativ kann die Verschiebung entlang einer Kreisbahn oder krummlinigen Bahn in Längsrichtung mittels der Sensoranordnung bestimmbar sein. 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. Preferred and / or advantageous embodiments of the invention emerge from the dependent claims, the description and the accompanying claims Characters. The invention relates to 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. For example, 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. Furthermore, 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.
Die Sensoranordnung umfasst die Flusselementgruppe, eine Spulengruppe und eine Auswerteeinrichtung. Vorzugsweise bildet die Spulengruppe eine stationäre Spulen gruppe, beispielsweise stationär in der Umgebung, einem Bauteil, Gehäuse oder Fahrzeug angeordnet oder anordenbar. Die Flusselementgruppe ist vorzugsweise eine bewegliche Flusselementgruppe. 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.
Die Spulengruppe weist mindestens zwei Flachspulen auf. Vorzugsweise umfasst die Spulengruppe exakt zwei Flachspulen, alternativ drei, vier oder mehr Flachspulen.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.
Die Flachspulen der Spulengruppe sind vorzugsweise gleichartig, beispielsweise mit gleicher Geometrie und/oder Induktivitäten, ausgebildet. Alternativ können die Flach spulen der Spulengruppe unterschiedlich ausgebildet sein, beispielsweise mit unter schiedlichen Geometrien und/oder Induktivitäten. Die Flachspulen sind benachbart in Querrichtung angeordnet. Die Querrichtung ist quer zur Längsrichtung angeordnet. Beispielsweise steht die Querrichtung senkrecht zu der Längsrichtung. Insbesondere versteht man unter Flachspulen, elektrische Spulen, die flächig ausgebildet sind. Vor zugsweise liegen die flächig ausgebildeten Flachspulen mit ihrer flächigen Erstre ckung in der Ebene Querrichtung-Längsrichtung, welche durch die Richtungsvekto ren in Längsrichtung und Querrichtung aufgespannt wird. Im Speziellen sind die Flachspulen unmittelbar nebeneinander in Richtung der Querrichtung angeordnet. Im Speziellen kann die Spulengruppe mehr als zwei Flachspulen umfassen, wobei die mehr als zwei Flachspulen vorzugsweise nebeneinander in Querrichtung angeordnet sind. Die Flachspulen können beispielsweise als gedruckte Spulen ausgebildet sein. Insbesondere bilden die Flachspulen einlagige Spulen. Alternativ können die Flach studien mehrlagige Flachspulen bilden. Die Flachspulen weisen vorzugsweise eine rechteckige und/oder quadratische Fläche und/oder Kontur auf, wobei diese Fläche insbesondere in der Längsrichtung-Querrichtung Ebene liegt. The flat coils of the coil group are preferably of the same type, for example with the same geometry and / or inductances. Alternatively, 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. For example, the transverse direction is perpendicular to the longitudinal direction. In particular 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. In particular, the flat coils are arranged directly next to one another in the direction of the transverse direction. In particular, 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. In particular, the flat coils form single-layer coils. Alternatively, 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.
Die Flusselementgruppe umfasst mindestens zwei Flusselemente. Im Speziellen um fasst die Flusselementgruppe exakt zwei Flusselemente, alternativ mehr als zwei Flusselemente, beispielsweise fünf oder zehn Flusselemente. Die Flusselemente sind vorzugsweise flächig ausgebildet. Beispielsweise weisen die Flusselemente eine rechteckige, quadratische, runde oder elliptische Fläche auf. Die flächige Erstreckung der Flusselemente ist insbesondere so angeordnet, dass diese parallel und/oder gleichgerichtet zur Ebene Querrichtung-Längsrichtung liegen. Die mindestens zwei Flusselemente sind zueinander in Längsrichtung und in Querrichtung versetzt ange ordnet. Insbesondere sind die zwei Flusselemente benachbart zueinander angeord net. Im Speziellen sind immer zwei benachbart angeordnete Flusselemente zueinan der in Längsrichtung und in Querrichtung versetzt und/oder verschoben angeordnet. Insbesondere sind die Flusselemente in der Flusselementgruppe so angeordnet, dass bei einer Anordnung der Flusselementgruppe über der Spulengruppe ein Flus selement eine der mindestens zwei Spulen abgedeckt, wobei die 2. Spule nicht durch die benachbarten Flusselemente abgedeckt ist, wobei das Abdecken in Form einer Projektion verstanden wird. Die Flusselemente sind beispielsweise und/oder umfassen beispielsweise ein elektrisch leitfähiges Material. Insbesondere können die Flusselemente ferromagnetisch oder diamagnetisch ausgebildet sein. Umfasst die Flusselementgruppe mehr als zwei Flusselemente, so sind ein erstes und zweites Flusselement in Längsrichtung gezählt zueinander in Längsrichtung und Querrich tung versetzt angeordnet, wobei ein drittes Flusselement, welches auf das zweite Flusselement in Längsrichtung folgt, bezüglich des ersten Flusselementes nur in Längsrichtung versetzt ist. The flow element group comprises at least two flow elements. In particular, 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. For example, 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. In particular, the two flow elements are arranged adjacent to one another. In particular, 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. In particular, 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. In particular, 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.
Die Flusselementgruppe definiert und/oder bestimmt eine Flusselementebene. Bei spielsweise ist die Flusselementebene die Ebene, in welcher alle Flusselemente der Flusselementgruppe liegen. Alternativ kann als Flusselementebene die Ebene ver standen werden, die durch die Flusselemente aufgespannt wird die aktuell parallel und/oder minimal beanstandet zur Spulengruppe und/oder Spulenebene sind. Die Spulenebene ist insbesondere durch die Spulengruppe definiert. Beispielsweise ist die Spulenebene die Ebene, in der die flächigen Flachspulen angeordnet sind. The flow element group defines and / or determines a flow element level. For example, the flow element level is the level in which all flow elements of the flow element group lie. Alternatively, 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. For example, the coil plane is the plane in which the flat flat coils are arranged.
Die Spulenebene ist beabstandet zur Flusselementebene angeordnet. Insbesondere sind Spulenebene und Flusselementebene äquidistant und/oder parallel zueinander angeordnet. Im Speziellen, beispielsweise bei einer biegeschlaffen und/oder ge krümmten Spulenebene oder Flusselementebene, sind Spulenebene und Flussele mentebene zumindest abschnittsweise äquidistant beanstandet und/oder parallel zu einander angeordnet, wobei diese abschnittsweise Anordnung insbesondere im Be reich der Flachspulen vorliegt. The coil plane is arranged at a distance from the flux element plane. In particular, the coil plane and the flux element plane are arranged equidistantly and / or parallel to one another. In particular, for example in the case of a pliable and / or curved coil plane or flux element plane, 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.
Die Flusselementgruppe und die Spulengruppe sind relativ zueinander in Längsrich tung beweglich und/oder verschiebbar. Insbesondere sind Flusselementgruppe und/oder Spulengruppe geführt zueinander in Längsrichtung beweglich. Die Bewe gung der Flusselementgruppe relativ zur Spulengruppe ist beispielsweise als Trajek- torie vorgegeben und/oder zu verstehen. Die Trajektorie weist insbesondere in Längsrichtung und/oder besitzt als Freiheitsgrad der Bewegung nur die Längsrich tung. Insbesondere ist es vorgesehen, dass die Spulengruppe in der Sensoranord nung und/oder an ihrem Einbauort stationär angeordnet ist, wobei die Flusselement gruppe in Längsrichtung relativ zu Spulengruppe beweglich und/oder verschiebbar ist. Durch das Verschieben und/oder Bewegen der Flusselementgruppe entlang der Längsrichtung werden beispielsweise die Flusselemente der Flusselementgruppe re- lativ zu der Spulengruppe und im Speziellen zu den Flachspulen bewegt. Im Speziel len werden durch die Bewegung und/oder das Verschieben der Flusselementgruppe und/oder der Flusselemente Flachspulen entsprechend der aktuellen Verschiebung von unterschiedlichen Flusselementen und/oder unterschiedlich stark abgedeckt und/oder bedeckt. The flux element group and the coil group are movable and / or displaceable relative to one another in the longitudinal direction. In particular, 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. In particular, it is provided that 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. By shifting and / or moving the flow element group along the longitudinal direction, for example, the flow elements of the flow element group are re moved relative to the coil group and in particular to the flat coils. In particular, 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.
Die Flachspuren sind derart ausgebildet und wurden angeordnet, dass die aktuellen Induktivitäten jeder Flachspule von der Verschiebung der Flusselementgruppe und/o der der Flusselemente relativ zur Spulengruppe abhängig ist. Je nach Verschiebung ist eine Flachspule in der Projektion auf die Spulenebene unterschiedlich stark und/o der von einer unterschiedlichen Anzahl an Flusselementen bedeckt. Der Grad der Bedeckung, Abdeckung und/oder ein veränderter Abstand eines Flusselementes zur Flachspule beeinflusst und/oder verändert die aktuelle Induktivität der Flachspule. Beispielsweise führt eine Induktion von Wirbelströmen in die Flusselementgruppe und/oder Flusselement zu Veränderung der Induktivitäten der jeweils benachbarten und/oder induzierenden Flachspulen. 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. Depending on the displacement, 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.
Die Auswerteinrichtung ist ausgebildet und/oder eingerichtet, für jede Flachspule die aktuellen Induktivitäten zu ermitteln und/oder zu bestimmen. Beispielsweise ist die Auswerteinrichtung ausgebildet die Flachspulen mit einer Frequenz elektrisch anzu regen und darauf basierend die aktuelle Induktivität zu bestimmen. Je nach Bede ckung der jeweiligen Flachspule und/oder Beabstandung der jeweiligen Flachspule durch die Flusselemente ist die aktuelle Induktivitäten unterschiedlich. Die Auswer teeinrichtung ist ausgebildet, basierend auf den aktuellen Induktivitäten der Flachs pullen, insbesondere aller Flachspulen der Spulengruppe oder einer Teilmenge da von, die Verschiebung und/oder die Position in Längsrichtung zu bestimmen. Bei spielsweise ist die Auswerteeinrichtung durch Bestimmung der aktuellen Induktivitä ten in der Lage, die relative Position von Flusselementgruppe und Spulengruppe zu einander zu bestimmen, wobei auf dieser Bestimmung im Speziellen auch die Ver schiebung und/oder Position bestimmbar ist. The evaluation device is designed and / or set up to determine and / or determine the current inductances for each flat coil. For example, the evaluation device is designed to electrically excite the flat coils with a frequency and to determine the current inductance based thereon. Depending on the coverage of the respective flat coil and / or the spacing of the respective flat coil by the flux elements, 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.
Der Erfindung liegt die Überlegung zugrunde, Spulen einer Spulengruppe nicht in Längsrichtung benachbart anzuordnen, sondern in Querrichtung, sodass ich hier eine besonders kleinbauende Spulengruppe erzielbar ist. Um eine gute Verschie bungsauflösung und/oder Positionsauflösung zu ermöglichen, sieht die Erfindung vor, die Flusselementgruppe derart zu realisieren, dass durch die versetztes anord nen der Flusselemente in Quer- und Längsrichtung einen Ausgleich zur Anordnung der Spulen in Querrichtung erzielt wird. 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. In order to enable a good displacement resolution and / or position resolution, 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.
Eine Ausgestaltung der Erfindung sieht vor, dass die Flachspulen jeweils eine Spu lenfläche definieren. Als Spulenfläche wird insbesondere Flächeninhalt, Kontur und/oder Form der Fläche verstanden. Die Flusselemente definieren jeweils eine Flusselementfläche. Die Spulenfläche und die Flusselementfläche sind insbesondere jeweils die Flächen, die parallel und/oder gleichgerichtet zur Ebene Längsrichtung- Querrichtung liegen. Die Ausgestaltung sieht vor, dass die Flusselementflächen und die Spulenflächen kongruent und/oder deckungsgleich ausgebildet sind. Beispiels weise sind die Flusselementflächen und Spulenflächen als Rechtecke, im Speziellen Quadrate ausgebildet. Als Kongruent wird im Speziellen verstanden, dass bei einer Anordnung eines Flusselementes senkrecht über der Spulenfläche und/oder der Flachspule, die Spulenfläche und Flusselementfläche in Deckung sind und/oder bringbar sind. One embodiment of the invention provides that 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. For example, 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.
Optional ist es vorgesehen, dass die Flusselementgruppe eine Mehrzahl, insbeson dere mehr als zwei Flusselemente, aufweist und/oder umfasst. Dabei ist es vorgese hen, dass zwei benachbarte Flusselemente in Längsrichtung und in Querrichtung versetzt angeordnet sind, wobei ein Flusselement zu dem übernächsten Flussele ment lediglich in Längsrichtung und ohne Querversetzung angeordnet ist. Dieser Ausgestaltung liegt die Überlegung zugrunde, jeweils eine zickzackartige Struktur der Flusselemente entlang der Längsrichtung in der Flusselementgruppe zu erzeugen. Durch ein Bewegen und/oder Verschieben der Flusselementgruppe in Längsrichtung wird so jeweils abwechselnd eine der zwei Flachspulen der Spulengruppe durch ein Flusselement bedeckt, abgedeckt und/oder deren Induktivitäten beeinflusst. It is optionally provided that 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.
Besonders bevorzugt ist es, dass die Flusselemente in der Flusselementgruppe schachbrettartig angeordnet sind. Beispielsweise ist die Flusselementgruppe in Quer richtung in zwei Hälften und/oder Abschnitte geteilt, wobei in Längsrichtung innerhalb der Hälften und/oder Abschnitte jeweils Flusselemente abwechselnd mit einer Lücke bzw. keinem Flusselement angeordnet sind. Beispielsweise kann die Flusselement gruppe als eine Matrix mit Zeilen und Spalten aufgefasst werden, wobei sowohl ent lang der Zeilen als auch entlang der Spalten jeweils abwechselnd Flusselement und kein Flusselement bzw. Lücke angeordnet sind. Kein Flusselement kann beispiels weise als eine Lehrstelle, eine Lücke, Luft oder Trägermaterial sein. Besonders be vorzugt ist eine matrixartige Aufteilung der Flusselementgruppe mit zwei Zeilen in Querrichtung und n Flusselementen in Längsrichtung, wobei n eine natürliche Zahl größer 2, insbesondere größer als 4, ist. It is particularly preferred that the flow elements are arranged in the flow element group like a chessboard. For example, 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. For example, 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. A matrix-like division of the flow element group with two rows in the transverse direction and n flow elements in the longitudinal direction, where n is a natural number greater than 2, in particular greater than 4, is particularly preferred.
Im Speziellen ist es vorgesehen, dass die Flusselemente jeweils einen Meßflächen bereich aufweisen und/oder definieren. Beispielsweise ist der Meßflächenbereich die flächige Erstreckung des Flusselementes, vorzugsweise parallel zur Spulenebene und im Speziellen der metallische Abschnitt der flächigen Erstreckung. Dabei ist es vorgesehen, dass die Flusselemente innerhalb der Flusselementgruppe so angeord net sind, dass in Längsrichtung die Meßflächenbereiche nicht überlappend aber lü ckenlos angeordnet sind. Beispielsweise sind die Flusselemente als Rechtecke aus gebildet, wobei sich 2 benachbarte Flusselemente jeweils an den Eckbereichen kon taktieren. In particular, it is provided that the flow elements each have and / or define a measuring surface area. For example, 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. It is provided that 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. For example, the flow elements are formed as rectangles, with 2 adjacent flow elements each contacting each other at the corner areas.
Eine Ausgestaltung der Erfindung sieht vor, dass die Flusselemente als flächige Me tallelemente ausgebildet sind. Beispielsweise sind die flächigen Metallelemente Me tallplättchen oder Metallfolienabschnitte. Beispielsweise sind die Metallelemente aus Messing, Aluminium oder Eisen. Im Speziellen sind die Metallelemente als Kupfer plättchen und/oder Kupferfolienabschnitte ausgebildet. One embodiment of the invention provides that the flow elements are designed as flat metal elements. For example, the flat metal elements are metal platelets or metal foil sections. For example, the metal elements are made of brass, aluminum or iron. In particular, the metal elements are designed as copper plates and / or copper foil sections.
Besonders bevorzugt ist es, dass die Flusselementgruppe einen Träger aufweist. Die Flusselemente sind beispielsweise auf den Träger aufgedruckt, aufgeklebt, aufge dreht, eingewebt, angenäht oder aufgebracht. Insbesondere sind Träger und Flus selement einstückig miteinander verbunden. Der Träger ist vorzugsweise als ein flä chiger Träger ausgebildet, insbesondere mit Erstreckung in Längsrichtung und Quer richtung. Besonders bevorzugt ist es, dass der Träger flexibel und/oder biegeschlaff ausgebil det ist. Beispielsweise ist der Träger als eine Folie, Kunststoff oder Metallfolie ausge bildet. Alternativ kann der Träger biegesteif ausgebildet sein, beispielsweise als Kunststoff- oder Metallplatte. It is particularly preferred that the flow element group has a carrier. The flow elements are, for example, printed, glued, twisted, woven, sewn or applied onto the carrier. In particular, 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. For example, the carrier is designed as a film, plastic or metal foil. Alternatively, the carrier can be designed to be rigid, for example as a plastic or metal plate.
Optional ist es vorgesehen, dass der Träger ein Textil bildet. Beispielsweise ist der Träger als ein Gewirk oder Gewebe ausgebildet. Im Speziellen kann der Träger als ein Gurtband ausgebildet sein. It is optionally provided that the carrier forms a textile. For example, the carrier is designed as a knitted fabric or woven fabric. In particular, the carrier can be designed as a belt strap.
Eine Ausgestaltung der Erfindung sieht vor, dass die Flachspulen jeweils eine Wick lungsebene aufweisen und definieren. Die Wicklungsebene ist insbesondere gleich gerichtet zur Flusselementebene. Insbesondere sind die Wicklungen der Flachspule innerhalb der Wicklungsebene angeordnet, beispielsweise als eine schneckenför mige Wicklung und im Speziellen als eine quadratische Wicklung. One embodiment of the invention provides that the flat coils each have and define a winding plane. In particular, the winding plane is directed in the same direction as the flux element plane. In particular, 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.
Besonders bevorzugt ist es, dass die Spulengruppe stationär ausgebildet und/oder angeordnet ist. Beispielsweise ist die Spulengruppe stationär und/oder fixiert in der Sensoranordnung oder einem Gehäuse der Sensoranordnung angeordnet. Insbe sondere ist es dabei vorgesehen, dass die Flusselementgruppe, der Träger und/oder die Flusselemente beweglich und/oder verschiebbar ausgebildet sind, insbesondere relativ zur Spulengruppe, den Flachspulen und/oder dem Gehäuse der Sensoranord nung. It is particularly preferred that the coil group is designed and / or arranged to be stationary. For example, the coil group is arranged in a stationary and / or fixed manner in the sensor arrangement or in a housing of the sensor arrangement. In particular, it is provided that 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.
Einen weiteren Gegenstand der Erfindung bildet eine Gurtbandanordnung für ein Fahrzeug die Gurtbandanordnung umfasst ein Gurtband und eine Spulengruppe. Die Spulengruppe ist insbesondere ausgebildet wie oben beschrieben und/oder wie in der Sensoranordnung nach einem der Ansprüche 1 11 Auf dem Gurtband sind Flus selemente angeordnet, aufgeprägt, aufgeklebt, aufgedruckt oder eingewebt. Insbe sondere definiert das Gurtband oder der Abschnitt über und/oder parallel zur Spulen gruppe die Flusselementebene. Die Flusselemente sind auf dem Gurtband so ange ordnet, dass zwei benachbarte Flusselemente jeweils in Längsrichtung und in Quer richtung zueinander beanstandet sind. Insbesondere bildet das Gurtband einen Trä- ger wie für die Sensoranordnung beschrieben. Das Gurtband ist relativ zu der Spu lengruppe bewegbar und/oder verschiebbar. Insbesondere ist das Gurtband relativ in Längsrichtung zur Spulengruppe bewegbar und/oder verschiebbar. Durch das Ver schieben und/oder Bewegen des Gurtband in Längsrichtung werden Flachspulen der Spulengruppe, die in Querrichtung angeordnet sind, jeweils abwechselnd bedeckt und/oder freigegeben von Flusselementen der Flusselementgruppe. Die Flussele mente und/oder die Flusselementgruppe beeinflusst die aktuellen Induktivitäten der Flachspulen. Die Gurtanordnung umfasst insbesondere eine, im Speziellen die Aus werteeinrichtung wie vorher beschrieben. Die Auswerteeinrichtung ist ausgebildet, basierend auf den gemessenen aktuellen Induktivitäten eine Verschiebung und/oder Position des Gurtbands, der Flusselemente und/oder Flusselementgruppe in Längs richtung zu bestimmen. Beispielsweise wird dazu die Induktivitäten der mindestens zwei in Querrichtung beanstandeten Flachspulen bestimmt, wobei basierend auf die ser Bestimmung die Anordnung und/oder ein Bedeckungsgrad üblich der Elemente bestimmbar ist, bei darauf basierend die Auszugslänge und/oder Position des Gurt bands bestimmbar ist. 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. In particular, 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. In particular, 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. In particular, the belt strap can be moved and / or displaced relative to the coil group in the longitudinal direction. By pushing and / or moving the belt 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. For example, 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.
Einen weiteren Gegenstand der Erfindung bildet ein Verfahren zur Bestimmung einer Verschiebung und/oder Position in und/oder entlang einer Längsrichtung. Das Ver fahren ist zur Erfassung der Verschiebung und/oder der Position mittels der Senso ranordnung nach einem der Ansprüche 1-11 und/oder der Gurtband Anordnung aus gebildet. Das Verfahren sieht dabei vor, dass für jede der Flachspulen die aktuelle In duktivität ermittelt wird und die Verschiebung und/oder Position basierend auf den er mittelten aktuellen Induktivitäten bestimmt wird. 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.
Weitere Vorteile, Wirkungen und Ausgestaltungen ergeben sich aus den beigefügten Figuren und deren Beschreibung. Dabei zeigen: Further advantages, effects and configurations emerge from the attached figures and their description. Show:
Figur 1 eine Spulengruppe; Figure 1 shows a coil group;
Figur 2 eine Sensoranordnung als ein Ausführungsbeispiel der Erfindung; FIG. 2 shows a sensor arrangement as an exemplary embodiment of the invention;
Figur 3 Induktivitätsverlauf der Flachspulen aus Figur 2; Figur 4 ein weiteres Ausführungsbeispiel einer Sensoranordnung; FIG. 3 shows the inductance curve of the flat coils from FIG. 2; FIG. 4 shows a further exemplary embodiment of a sensor arrangement;
Figur 5 Induktivitätsverlauf für die Sensoranordnung aus Figur 4. FIG. 5 Inductance curve for the sensor arrangement from FIG. 4.
Figur 1 zeigt ein Ausführungsbeispiel einer Spulengruppe 1. Die Spulengruppe 1 um fasst zwei Flachspulen 2a und 2b. Die Spulengruppe 1 und die Flachspulen 2a, 2b sind flächig ausgebildet, und definieren eine Spulenebene 3, wobei in der Spulen ebene 3 die Wicklungen der Flachspulen 2a, 2b liegen. 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.
Zur Erläuterung der später gezeigten Sensoranordnung sind hilfsweise Richtungs vektoren 4a und 4b eingezeichnet. Die Längsrichtung ist dabei entlang des Rich tungsvektor 4a orientiert, wobei die Querrichtung senkrecht auf der Längsrichtung steht und durch den Richtungsvektor 4b dargestellt ist. Die Spulenebene 3 ist gleich gerichtet zur Ebene die durch die Richtungsvektoren 4a und 4b aufgespannt wird. Diese durch die Richtungsvektoren 4a und 4b auf gespannte Ebene wird auch als Ebene Längsrichtung-Querrichtung bezeichnet. To explain the sensor arrangement shown later, 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.
Die Flachspulen 2a, 2b sind nebeneinander angeordnet. Insbesondere sind die Flachspulen 2a, 2b in Querrichtung unmittelbar nebeneinander angeordnet. Die Flachspulen 2a, 2b unterteilen die Spulenebene 3 in Querrichtung in zwei Teile, auch Zeilen 5a und 5b genannt. Insbesondere ist die Teilung in Querrichtung durch die Flachspulen 2a, 2b eine hälftige Teilung. Die Flachspulen 2a, 2b sind somit flächen gleich ausgebildet, insbesondere sowohl bezüglich des Flächeninhalts als auch be züglich der Form. The flat coils 2a, 2b are arranged next to one another. In particular, 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. In particular, 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.
Die Flachspulen 2a, 2b weisen jeweils einen Kontakt 6 auf, wobei der Kontakt 6 der Kontaktierung mit einer Auswerteeinrichtung dient. Die Auswerteeinrichtung ist aus gebildet, die jeweiligen Induktivitäten L, insbesondere aktuelle Induktivitäten L der beiden Flachspulen 2a, 2b zu bestimmen. Dabei wird beispielsweise die Physik und/oder Mathematik eines Schwingkreises zur Messung der Interaktivität L genutzt. Beispielsweise wird die Flachspule 2a, 2b mittels der Auswerteeinrichtung über den Kontakt 6 Wechselspannung bestimmter Frequenzen bestromt und basierend auf der Reaktion darauf die Induktivität L bestimmt. 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. For example, the physics and / or mathematics of an oscillating circuit are used to measure the interactivity L. For example, 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.
Figur 2 zeigt ein Ausführungsbeispiel einer Sensoranordnung 7. Die Sensoranord nung 7 umfasst die Spulengruppe 1 aus Figur 1 . Ferner umfasst die Sensoranord nung 7 eine Flusselementgruppe 8. Die Flusselementgruppe 8 umfasst zwei Flus selemente 9a und 9b. Die Flusselemente 9a und 9b sind als metallische flächige Ele mente ausgebildet. Beispielsweise sind die Flusselemente 9a und 9b als Kupfer Plättchen ausgebildet. Die Flusselemente 9a und 9b sind benachbart zueinander an geordnet, insbesondere kontaktieren sich diese in einem Kontaktbereich 10. Die Kontaktierung im Kontaktbereich 10 erfolgt an Eckbereichen der Flusselemente 9a und 9b. Die Flusselemente 9a und 9b sind in einer gemeinsamen Ebene, der Flus selementebene 11 angeordnet. Die Flusselementebene 11 ist parallel zur Spulen ebene 3 angeordnet. Insbesondere sind Spurenebene 3 und Flusselementebene 11 parallel zueinander angeordnet. Innerhalb der Flusselementebene 11 sind die Flus selemente 9a und 9b sowohl in Längsrichtung als auch in Querrichtung versetzt zuei nander angeordnet. Die Anordnung der Flusselemente 9a und 9b ist insbesondere schachbrettartig. Mit anderen Worten kann die Anordnung der Flusselemente 9a und 9b insbesondere wie bei gegenüberliegenden Windmühlenflügel angesehen werden. FIG. 2 shows an exemplary embodiment of a sensor arrangement 7. The sensor arrangement 7 comprises the coil group 1 from FIG. Furthermore, 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. For example, 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. Within the flow element plane 11, 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.
Die Flusselementgruppe 8 und die Flusselemente 9a und 9b sind in Längsrichtung verschiebbar. Insbesondere erfolgt die Verschiebung innerhalb der Flusselement ebene und/oder parallel zur Spulenebene 3. Durch das Verschieben der Spulen gruppe 8 verändert sich die Abdeckung und/oder Bedeckung der Flachspulen 2a, 2b durch die Flusselemente 9a und 9b. Als Abdeckung und/oder Bedeckung wird insbe sondere das Bedecken in eine Draufsicht von oben, im Speziellen senkrecht zur Spu lenebene 3, der Flachspulen 2a, 2b durch die Flusselemente 9a, 9b verstanden. Bei spielsweise ist in der gezeigten Darstellung die Flachspule 2a vollständig durch das Flusselement 9a bedeckt und/oder abgedeckt. Die Flachspule 2b ist in der gezeigten Darstellung weder durch das Flusselement 9a noch durch das Flusselement 9b be deckt. Durch ein Verschieben der Flusselementgruppe 8, in diesem Beispiel nach rechts, wird die Abdeckung der Flachspule 2a reduziert und die Flachspule 2b wird durch das Flusselement 9b mehr und mehr bedeckt. Die Induktivitäten der Flachspulen 2a, 2b hängen von der Bedeckung und/oder Ab deckung durch die Flusselemente 9a und 9b ab. In dem hier ausgeführten Beispiel verstärkt die Abdeckung einer Flachspule 2a, 2b die aktuelle Induktivität L der Flach spule 2a, 2b. Dementsprechend ist im gezeigten Zustand die gemessene aktuelle In duktivität Li der Flachspule 2a größer als die aktuelle Induktivität l_2 der Flachspule 2b. Durch das Bestimmen beider aktuellen Induktivitäten Li, L.2., ist von der Auswer teeinrichtung die Positionsbestimmung des Flusselements 9a, 9b bzw. der Flussele mentgruppe 8 bestimmbar. Insbesondere ist die Auswerteeinrichtung ausgebildet, basierend auf dieser Bestimmung die Verschiebung, beispielsweise als Verschie bung der Flusselementgruppe 8 relativ zur Spulengruppe 1 , zu bestimmen. 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. For example, in the illustration shown, the flat coil 2a is completely covered and / or covered by the flux element 9a. In the illustration shown, the flat coil 2b is neither covered by the flux element 9a nor by the flux element 9b. By shifting the flux element group 8, in this example to the right, 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. In the example given here, 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. By determining the two current inductances Li, L.2., The position determination of the flux element 9a, 9b or the flux element group 8 can be determined by the evaluating device. In particular, 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.
Figur 3 zeigt für die Sensoranordnung 7 aus Figur 2 einen gemessenen und/oder zu erwartenden Induktivitätsverlauf für die beiden Flachspulen 2a, 2b. In der Darstellung ist entlang der Abszisse die Längsverschiebung x der Flusselementgruppe 8 relativ zur Spulengruppe 1 in Millimetern aufgetragen. Insbesondere entspricht dies der ge messenen und/oder zu bestimmenden Verschiebung. Auf der Ordinate sind die In duktivitäten in Nanohenry aufgetragen. 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. In the illustration, 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.
Die Darstellung zeigt dabei die Induktivitäten Li und L2. Die Induktivität Li entspricht der Induktivität der Flachspule 2a aus Figur 2. Diese ist für eine Verschiebung von 0 vollständig durch das Flusselement 9a abgedeckt, sodass die aktuelle Induktivität Li für x=0 maximal ist. In diesem Fall beträgt die maximale Induktivität Li für die Flach spule 2a etwa 800 Nanohenry. Die Induktivität L2 stellt die aktuelle Induktivität der Flachspule 2b aus Figur 2 dar. Für die Verschiebung von 0 ist diese vollständig unbe deckt und/oder vollständig unabgedeckt. Die aktuelle gemessene Induktivität L2 ist somit für x=0 minimal, da diese durch zunehmende Bedeckung nurzunehmen kann. Diese minimale Induktivität für L2 beträgt ungefähr 270 Nano Henry. Durch eine Ver schiebung der Flusselementgruppe 8, beispielsweise hier der Verschiebung der Flus selementgruppe 8 nach rechts in Figur 2, nimmt die Abdeckung der Flachspule 2a ab, sodass die aktuelle Induktivitäten Li der Fachschule 2a mit zunehmender Ver schiebung abnimmt, wohingegen die Flachspule 2b durch zunehmende Verschie bung mehr und mehr von dem Flusselement 9b abgedeckt wird, sodass hierfür eine steigende Induktivität L2 verzeichnet wird. Somit sind die Induktivitäten Li und L2 ge genläufig, sodass durch die Messung der aktuellen Induktivitäten Li, L2 beider Flach spulen 9a, 9b die Positionierung der Flusselementgruppe relativ zur Spulengruppe 1 von der Auswerte Einrichtung bestimmbar ist. The illustration shows the inductances Li and L2. The inductance Li corresponds to the inductance of the flat coil 2a from FIG. 2. This is completely covered by the flux element 9a for a shift of 0, so that the current inductance Li is maximum for x = 0. In this case, the maximum inductance Li for the flat coil 2a is about 800 nanohenries. The inductance L2 represents the current inductance of the flat coil 2b from FIG. 2. For the shift from 0 this is completely uncovered and / or completely uncovered. The currently measured inductance L2 is thus minimal for x = 0, since it can only increase with increasing coverage. This minimum inductance for L2 is approximately 270 nano henries. By shifting the flux element group 8, for example here by shifting the flux element group 8 to the right in Figure 2, 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. Thus, 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.
Figur 4 zeigt ein Ausführungsbeispiel einer Sensoranordnung 7, das wiederum zwei Flachspulen 2a, 2b in einer Spulengruppe 1 umfasst. Die Spulengruppe 1 ist ausge bildet wie die Spulengruppe aus Figur 1. 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.
Im Unterschied zur Sensoranordnung 7 aus Figur zwei umfasst die Flusselement gruppe 8 hier vier Flusselemente 9a, 9b, 9c und 9d. Die Flusselemente 9a, 9b, 9c und 9d sind in der Flusselementebene, einer Ebene parallel zur Spulenebene 3, schachbrettartig angeordnet. Innerhalb einer Zeile 5a, 5b wechseln sich Flussele mente 9a, 9b, 9c und 9d jeweils mit einer Lücke ab. Eine Lücke in einer Zeile 5a, 5b korrespondiert in der anderen Zeile 5b, 5a in Querrichtung mit einem Flusselemente 9a, 9b, 9c und 9d. In contrast to the sensor arrangement 7 from FIG. Two, 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.
Durch die Verschiebung der Flusselementgruppe 8 in Längsrichtung wird jede Flach spule 2a, 2b mehrmals, hier zweimal, vollständig abgedeckt und vollständig freigege ben. Die Induktivitäten Li, L2 werden durch diese Verschiebung mehrere Minima und Maxima durchlaufen, die zur Positionsbestimmung und/oder Verschiebungsbestim mung durch die Auswerteeinrichtung genutzt werden. By shifting the flux element group 8 in the longitudinal direction, each flat coil 2a, 2b is completely covered several times, here twice, and completely free ben. As a result of this shift, 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.
Figur 5 zeigt den zugehörigen Induktionsverlauf in den Flachspulen 2a, 2b für die Sensoranordnung 7 aus Figur 4. Die Induktivität L1 , der Spule 2a beginnt wegen ma ximaler Bedeckung bei x=0 durch das Flusselement 9a bei einem Maximum, wobei die Induktivität Li für zunehmende Verschiebung auf ein Minimum sind, nämlich dann wenn das Flusselement 9b die Spule 2b vollständig bedeckt, das nächste Maximum der Induktivität Li wird für die Verschiebung erreicht, wenn das Flusselement 9c die Spule 2a vollständig bedeckt. Einen analogen Verlauf erhält man für die Induktivität L2 der Spule 2b, wobei diese für x=0 bei einem Minimum beginnt, da die Spule hier vollständig unabgedeckt von Flusselementen ist. Basierend auf diesem Verlauf wird von der Auswerteeinrichtung die Verschiebung und/oder Position in Längsrichtung bestimmt. FIG. 5 shows the associated induction curve in the flat coils 2a, 2b for the sensor arrangement 7 from FIG. 4. The inductance L1 of the coil 2a begins at a maximum because of the maximum coverage at x = 0 by the flux element 9a, with the inductance Li increasing Displacement are to a minimum, namely when the flux element 9b completely covers the coil 2b, the next maximum of the inductance Li is reached for the displacement when the flux element 9c completely covers the coil 2a. An analog curve is obtained for the inductance L2 of the coil 2b, this beginning at a minimum for x = 0, since the coil is completely uncovered by flux elements here. Based on this history will determined by the evaluation device, the displacement and / or position in the longitudinal direction.
Bezuqszeichen Reference symbol
I Spulengruppe I coil group
2a, b Flachspulen 2a, b flat coils
3 Spulenebene 3 coil level
4a, b Richtungsvektoren 4a, b direction vectors
5a, b Zeilen 5a, b lines
6 Kontakt 6 Contact
7 Sensoranordnung 7 Sensor arrangement
8 Flusselementgruppe 8 flow element group
9a-d Flusselemente 9a-d flow elements
10 Kontaktbereich 10 contact area
I I Flusselementebene I I flux element level
Li, l_2, Indutkivitäten x Längsverschiebung Li, l_2, inductivities x longitudinal displacement

Claims

Patentansprüche Claims
1. Sensoranordnung (7) zur Erfassung einer Position und/oder einer Verschie bung einer Flusselementgruppe (8) entlang einer Längsrichtung, mit einer Spulengruppe (1) und der Flusselementgruppe (8), wobei die Spulengruppe (1) mindestens zwei Flachspulen (2a, b) umfasst, wo bei die mindestens zwei Flachspulen (2a, b) in eine Querrichtung quer zur Längsrichtung angeordnet sind, wobei die Flusselementgruppe (8) mindestens zwei Flusselemente (9a, b) um fasst, wobei die mindestens zwei Flusselemente (9a, b) benachbart zueinan der in Längsrichtung und in Querrichtung versetzt angeordnet sind, wobei die Flusselementgruppe (8) eine Flusselementebene (11) definiert und die Spulengruppe (1) eine Spulenebene (3) definiert, wobei die Spulenebene (3) beabstandet zur Flusselementebene (11) angeordnet ist, wobei die Flus selementgruppe (8) und die Spulengruppe (1) relativ zueinander in Längsrich tung beweglich und/oder verschiebbar sind, wobei die Flachspulen (2a, b) derart ausgebildet sind, dass eine aktuelle In duktivität (Li, L2) jeder Flachspule (2a, b) von der aktuellen Verschiebung der Flusselementgruppe (8) zur Spulengruppe (1) abhängig ist, mit einer Auswerteeinrichtung, die dazu eingerichtet ist, für jede Flachspule (2a, b) die aktuelle Induktivität (Li, L2) zu ermitteln und die aktuelle Verschie bung basierend auf den ermittelten aktuellen Induktivitäten (Li, L2)zu bestim men. 1. Sensor arrangement (7) for detecting a position and / or a displacement of a flux element group (8) along a longitudinal direction, with a coil group (1) and the flux element group (8), the coil group (1) having at least two flat coils (2a, b), where the at least two flat coils (2a, b) are arranged in a transverse direction transversely to the longitudinal direction, the flux element group (8) comprising at least two flux elements (9a, b), the at least two flux elements (9a, b ) adjacent to one another which are offset in the longitudinal direction and in the transverse direction, the flux element group (8) defining a flux element plane (11) and the coil group (1) defining a coil plane (3), the coil plane (3) being spaced from the flux element plane (11) is arranged, wherein the Flus selementgruppe (8) and the coil group (1) are movable and / or displaceable relative to one another in the longitudinal direction, the flat coils (2a, b) being designed such that a current In ductivity (Li, L2) of each flat coil (2a, b) is dependent on the current displacement of the flux element group (8) to the coil group (1), with an evaluation device which is set up for each flat coil (2a, b) the determine the current inductance (Li, L2) and determine the current displacement based on the determined current inductance (Li, L2).
2. Sensoranordnung (7) nach Anspruch 1 , dadurch gekennzeichnet, dass die Flachspulen (2a, b) jeweils eine Spulenfläche definieren und die Flussele mente (9a-d) jeweils eine Flusselementfläche definieren, wobei die Flussele mentfläche und die Spulenfläche kongruent ausgebildet sind. 2. Sensor arrangement (7) according to claim 1, characterized in that the flat coils (2a, b) each define a coil area and the flux elements (9a-d) each define a flux element area, the flux element area and the coil area being congruent.
3. Sensoranordnung (7) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Flusselementgruppe (8) eine Mehrzahl an Flusselementen (9a-d) aufweist, wobei zwei benachbarte Flusselemente (9a-d) in Längsrichtung und in Quer richtung versetzt angeordnet sind, wobei die Flusselemente (9a-d) bezüglich des zum benachbarten benachbart angeordneten Flusselements (9a-d) in Längsrichtung beabstandet und ohne Querversetzung angeordnet ist. 3. Sensor arrangement (7) according to claim 1 or 2, characterized in that the flow element group (8) has a plurality of flow elements (9a-d), wherein two adjacent flow elements (9a-d) are arranged offset in the longitudinal direction and in the transverse direction , wherein the flow elements (9a-d) with respect to of the flow element (9a-d) arranged next to one another is spaced apart in the longitudinal direction and arranged without transverse offset.
4. Sensoranordnung (7) nach einem der vorherigen Ansprüche, dadurch gekenn zeichnet, dass die Flusselemente (9a-d) in der Flusselementgruppe (8) schachbrettartig angeordnet sind. 4. Sensor arrangement (7) according to one of the preceding claims, characterized in that the flow elements (9a-d) in the flow element group (8) are arranged like a chessboard.
5. Sensoranordnung (7) nach einem der vorherigen Ansprüche, dadurch gekenn zeichnet, dass die Flusselemente (9a-d) als flächige Metallelemente ausgebil det sind. 5. Sensor arrangement (7) according to one of the preceding claims, characterized in that the flow elements (9a-d) are ausgebil det as flat metal elements.
6. Sensoranordnung (7) nach einem der vorherigen Ansprüche, dadurch gekenn zeichnet, dass die Flusselemente (9a-d) jeweils einen Messflächenbereich aufweisen, wobei die Flusselemente (9a-d) in der Flusselementgruppe (8) so angeordnet sind, dass in Längsrichtung die Messflächenbereiche nicht über lappend und lückenlos angeordnet sind. 6. Sensor arrangement (7) according to one of the preceding claims, characterized in that the flow elements (9a-d) each have a measuring surface area, wherein the flow elements (9a-d) are arranged in the flow element group (8) so that in the longitudinal direction the measuring surface areas are not arranged overlapping and without gaps.
7. Sensoranordnung (7) nach einem der vorherigen Ansprüche, dadurch gekenn zeichnet, dass die Flusselementgruppe (8) einen Träger aufweist, wobei die Flusselemente (9a-d) auf den Träger aufgedruckt, aufgeklebt, aufgeprägt, ein gewebt und/oder aufgebracht sind. 7. Sensor arrangement (7) according to one of the preceding claims, characterized in that the flow element group (8) has a carrier, wherein the flow elements (9a-d) are printed, glued, embossed, woven and / or applied onto the carrier .
8. Sensoranordnung (7) nach Anspruch 7, dadurch gekennzeichnet, dass der Träger flexibel und/oder biegeschlaff ausgebildet ist. 8. Sensor arrangement (7) according to claim 7, characterized in that the carrier is flexible and / or pliable.
9. Sensoranordnung (7) nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Träger ein Textil bildet. 9. Sensor arrangement (7) according to claim 7 or 8, characterized in that the carrier forms a textile.
10. Sensoranordnung (7) nach einem der vorherigen Ansprüche, dadurch ge kennzeichnet, dass die Flachspulen (2a, b) jeweils eine Wicklungsebene auf weisen, wobei die Flachspulen (2a, b) mit ihren Wicklungseben gleichgerichtet zur Flusselementebene (11 ) angeordnet sind. 10. Sensor arrangement (7) according to one of the preceding claims, characterized in that the flat coils (2a, b) each have a winding plane, the flat coils (2a, b) being arranged with their winding planes in the same direction as the flux element plane (11).
11 . Sensoranordnung (7) nach einem der vorherigen Ansprüche, dadurch gekenn zeichnet, dass die Spulengruppe (1 ) stationär ausgebildet ist und die Flussele mentgruppe (8) beweglich und/oder verschiebbar ausgebildet ist. 11. Sensor arrangement (7) according to one of the preceding claims, characterized in that the coil group (1) is designed to be stationary and the flux element group (8) is designed to be movable and / or displaceable.
12. Gurtbandanordnung für ein Fahrzeug, mit einem Gurtband und einer Spulen gruppe (1 ), wobei die Spulengruppe (1 ) mindestens zwei Flachspulen (2a, 2b) umfasst, wobei die Flachspulen quer zur Längsrichtung angeordnet sind, wo bei das Gurtband eine Flusselementgruppe (8) mit mindestens zwei Flussele menten (9a, b) umfasst, wobei die mindestens zwei Flusselemente (9a, b) be nachbart zueinander in Längsrichtung und in Querrichtung versetzt angeord net sind, wobei die Flusselementgruppe (8) eine Flusselementebene (11 ) defi niert und die Spulengruppe (1 ) eine Spulenebene (3) definiert, wobei die Spu lenebene (3) beabstandet zur Flusselementebene (11 ) angeordnet ist, wobei die Flusselementgruppe (8) und die Spulengruppe (1 ) relativ zueinander in Längsrichtung beweglich und/oder verschiebbar sind, wobei die Flachspulen (2a, b) derart ausgebildet sind, dass eine aktuelle Induktivität (Li, L2) jeder Flachspule (2a, b) von der aktuellen Verschiebung der Flusselementgruppe (8) zur Spulengruppe (1 ) abhängig ist, mit einer Auswerteeinrichtung, die dazu eingerichtet ist, für jede Flachspule (2a, b) die aktuelle Induktivität (Li, L2) zu ermitteln und die aktuelle Verschiebung und/oder eine Auszugslänge des Gurtbands basierend auf den ermittelten aktuellen Induktivitäten (Li, L2) zu be stimmen. 12. Belt webbing arrangement for a vehicle, with a belt webbing and a coil group (1), the coil group (1) comprising at least two flat coils (2a, 2b), the flat coils being arranged transversely to the longitudinal direction, where a flux element group ( 8) with at least two flux elements (9a, b), the at least two flux elements (9a, b) being arranged adjacent to one another in the longitudinal direction and offset in the transverse direction, the flux element group (8) defining a flux element level (11) and the coil group (1) defines a coil plane (3), the Spu len plane (3) being arranged at a distance from the flux element plane (11), the flux element group (8) and the coil group (1) being movable and / or displaceable relative to one another in the longitudinal direction are, the flat coils (2a, b) are designed in such a way that a current inductance (Li, L2) of each flat coil (2a, b) depends on the current displacement of the flux element group (8) to the coil base ppe (1) is dependent, with an evaluation device which is set up to determine the current inductance (Li, L2) for each flat coil (2a, b) and the current displacement and / or an extension length of the belt based on the current determined Inductivities (Li, L2) to be determined.
13. Verfahren zur Bestimmung einer Verschiebung und/oder Position mittels der Sensoranordnung (7) nach einem der Ansprüche 1-11 , wobei für jede der Flachspulen (2a, 2b) die aktuelle Induktivität (Li, L2) ermittelt wird und die Ver schiebung und/oder Position basierend auf den ermittelten aktuellen Induktivi täten (Li, L2) bestimmt wird. 13. A method for determining a displacement and / or position by means of the sensor arrangement (7) according to any one of claims 1-11, wherein for each of the flat coils (2a, 2b) the current inductance (Li, L2) is determined and the displacement and Ver / or position is determined based on the determined current inductivities (Li, L2).
EP20764067.3A 2019-09-04 2020-08-26 Inductive displacement and/or position detection Withdrawn EP4025876A1 (en)

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