Inductive displacement and / or position detection

Abstract

The invention relates to a sensor facility (7) for detecting the position and / or displacement of a flux element group (8) along a longitudinal direction, having: a coil group (1) and a flux element group (8), wherein the coil group (1) includes at least two flat coils (2a, b), wherein the flux element group (8) includes at least two flux elements (9a, b), wherein the at least two flux elements (9a, b) are arranged adjacent to one another and offset in the longitudinal direction and in the transverse direction, wherein the flux element group (8) and the coil group (1) are movable and / or displaceable relative to one another in the longitudinal direction, wherein the flat coils (2a, b) are configured such that the current inductance (L1, L2) of each flat coil (2a, b) depends on the current displacement of the flux element group (8) relative to the coil group (1); and further having an evaluation device which is set up to ascertain the current inductance (L1, L2) for each flat coil (2a, b) and to determine the current displacement based on the ascertained current inductance (L1, L2).

Description

Field of the Invention

[0001] The present invention relates to a sensor arrangement for detecting displacement and / or position along a longitudinal direction. The sensor arrangement includes a flux element group, a coil group, and an evaluation device. The sensor arrangement is particularly configured for a shift lever of an automatic shifting device of a belt arrangement or a vehicle. Background Art

[0002] In many technical fields, especially in the automotive field, it is necessary to detect longitudinal displacement and / or position along the longitudinal direction. Preferably, a sensor arrangement is used, which is constructed as small as possible and can be integrated invisibly into the interior. For example, the same sensor arrangement is used in a belt arrangement to determine the pulled-out length of the belt. In addition, such a sensor arrangement is used in a shift lever, especially in a shift lever of an automatic transmission, in order to be able to determine the current shift lever position.

[0003] In the published document "Frequency Response Modeling of Inductive Position Sensor with Finite Element Tools" by A.K. Palit https: / / www.comsol.de / paper / frequencv-response-modeling-of- inductive-position-sensor-with-finite-element-too-18933 (retrieved on August 28, 2019), an inductive sensor for determining displacement in the longitudinal direction is disclosed. Summary of the Invention

[0004] The object of the present invention is to improve the inductive determination of displacement and / or position along the longitudinal direction.

[0005] This object is solved by a sensor arrangement for detecting the displacement of a flux element group along the longitudinal direction and by a belt arrangement and a method according to claim 13. Preferred and / or advantageous embodiments of the present invention result from the dependent claims, the description, and the drawings.

[0006] The present invention relates to a sensor facility for detecting a position, in particular the position of a flux element group and / or a flux element along a longitudinal direction. The sensor facility is particularly configured to detect the displacement of the flux element group and / or the flux element along the longitudinal direction. For example, the relative displacement of the flux element group and / or the flux element along the longitudinal direction relative to a coil group and / or a flat coil can be determined by means of the sensor facility. The sensor facility is configured for inductively detecting the displacement and / or position along the longitudinal direction. The sensor facility is, for example, configured for a belt facility in a vehicle or a gearshift lever in a vehicle. The sensor facility is, for example, configured to determine the positioning of the gearshift lever, in particular the gearshift lever of a shift device of an automatic transmission, in particular to determine whether the N gear, P gear or D gear is selected. In addition, the sensor facility can also be configured to determine how far the belt of the belt facility has been pulled out based on the displacement of the flux element group. The displacement in the longitudinal direction is, for example, a displacement along a non-curved track. Alternatively, the displacement in the longitudinal direction along a circular track or a curved track can also be determined by means of the sensor facility.

[0007] The sensor facility includes a flux element group, a coil group and an evaluation device. The coil group preferably forms a stationary coil group, for example, stationary arranged or can be arranged in the surroundings, components, housing or vehicle. The flux element group is preferably a movable flux element group.

[0008] The coil group has at least two flat coils. The coil group preferably includes exactly two flat coils, alternatively three, four or more flat coils. The flat coils of the coil group are preferably the same, for example, constructed with the same geometry and / or inductance. The flat coils of the coil group can alternatively be constructed differently, for example, with different geometries and / or inductances. The flat coils are arranged adjacent to each other in the transverse direction. The transverse direction is arranged transversely to the longitudinal direction. The transverse direction is, for example, perpendicular to the longitudinal direction. The flat coil particularly refers to an electrically flat coil. The flatly constructed flat coil preferably has its flat extension in the transverse direction - longitudinal direction plane, which is spanned by the direction vectors in the longitudinal direction and the transverse direction. The flat coils are particularly arranged directly side by side in the transverse direction. The coil group can particularly include more than two flat coils, wherein the more than two flat coils are preferably arranged side by side in the transverse direction. The flat coils can be, for example, constructed as printed coils. The flat coils particularly form single-layer coils. The flat coils can alternatively form multi-layer flat coils. The flat coils preferably have rectangular and / or square faces and / or profiles, wherein these faces are particularly in the longitudinal direction - transverse direction plane.

[0009] The flux element group includes at least two flux elements. The flux element group particularly includes exactly two flux elements, optionally more than two flux elements, for example, five or ten flux elements. The flux elements are preferably flat. The flux elements may, for example, have rectangular, square, circular, or elliptical surfaces. The flat extension of the flux element is particularly arranged so that this extension is parallel to and / or oriented in the same direction as the transverse-longitudinal direction plane. At least two flux elements are arranged offset relative to each other in the longitudinal and transverse directions. The two flux elements are particularly arranged adjacent to each other. In particular, there are always two adjacently arranged flux elements that are offset and / or offset relative to each other in the longitudinal and transverse directions. The flux elements are particularly arranged in the flux element group such that, when the flux element group is arranged above the coil group, the flux element covers one of the at least two coils, wherein the second coil is not covered by the adjacent flux element, wherein covering is understood to be in the form of a projection. The flux element is, for example, and / or includes, for example, an electrically conductive material. The flux elements can in particular be ferromagnetic or diamagnetic. If the flux element group comprises more than two flux elements, the first and second flux elements, measured in the longitudinal direction, are arranged offset relative to one another in the longitudinal direction and in the transverse direction, wherein a third flux element following the second flux element in the longitudinal direction is offset relative to the first flux element only in the longitudinal direction.

[0010] The flux element group defines and / or determines a flux element plane. The flux element plane is, for example, a plane in which all flux elements of the flux element group lie. Alternatively, the flux element plane can be understood as a plane that is spanned by the flux elements and is currently parallel to and / or minimally spaced from the coil group and / or the coil plane. The coil plane is, in particular, defined by the coil group. The coil plane is, for example, a plane in which a flat coil is arranged.

[0011] The coil plane is arranged spaced apart from the flux element plane. The coil plane and the flux element plane are particularly arranged equidistant from one another and / or parallel to one another. In a flexible and / or curved coil plane or flux element plane, the coil plane and the flux element plane are particularly arranged at least in sections equidistant from one another and / or parallel to one another, wherein such a sectioned arrangement is particularly present in the region of a flat coil.

[0012] The flux element group and the coil group can move and / or be displaced relative to each other in the longitudinal direction. In particular, the flux element group and / or the coil group can be guided to move relative to each other in the longitudinal direction. The movement of the flux element group relative to the coil group is, for example, predefined as and / or can be understood as a trajectory. The trajectory is in particular directed 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 facility and / or at the installation location of the sensor facility, wherein the flux element group can move and / or be displaced relative to the coil group in the longitudinal direction. By the movement and / or displacement of the flux element group along the longitudinal direction, the flux elements of the flux element group move, for example, relative to the coil group and in particular relative to the flat coil. By the movement and / or displacement of the flux element group and / or the flux elements, the flat coil is covered and / or overlaid by different flux elements and / or to different extents, in particular depending on the current displacement.

[0013] The flat coils are constructed and arranged such that the current inductance of each flat coil depends on the displacement of the flux element group and / or the flux elements relative to the coil group. Depending on the displacement, the flat coils are covered to different extents and / or by different numbers of flux elements in the projection onto the coil plane. The degree of covering, overlaying and / or the changed spacing of the flux elements from the flat coil influence and / or change the current inductance of the flat coil. Eddy current induction into the flux element group and / or the flux elements, for example, results in a change in the inductance of the adjacent and / or inductive flat coils.

[0014] The evaluation device is constructed and / or set up to determine and / or ascertain the current inductance for each flat coil. The evaluation device is, for example, constructed to electrically excite the flat coil at a frequency and to determine the current inductance based thereon. Depending on the covering of the respective flat coil and / or the spacing of the respective flat coil from the flux elements, the current inductance is different. The evaluation device is constructed to determine the displacement and / or position in the longitudinal direction based on the current inductance of the flat coil, in particular of all flat coils of the coil group or of partial flat coils of the coil group. By determining the current inductance, the evaluation device is, for example, capable of determining the relative position of the flux element group and the coil group to each other, wherein based on this determination it is in particular also possible to determine the displacement and / or position.

[0015] The present invention is based on the idea that the coils of the coil group are not arranged adjacent to each other in the longitudinal direction, but adjacent to each other in the transverse direction, so that in this way a coil group can be constructed that is particularly small. To achieve good displacement resolution and / or position resolution, the present invention provides that the flux element group is implemented in such a way that a balance for the coils arranged in the transverse direction is achieved by arranging the flux elements staggered in the transverse and longitudinal directions.

[0016] A design solution of the present invention stipulates that each flat coil defines a coil plane. The coil plane particularly refers to the area, contour, and / or shape of the plane. Each flux element defines a flux element plane. The coil plane and the flux element plane are particularly planes that are parallel to and / or point in the same direction as the longitudinal-lateral direction plane. This design solution stipulates that the flux element plane and the coil plane are configured to be congruent and / or identical. The flux element plane and the coil plane are, for example, configured to be rectangular, particularly square. Congruent particularly means that when the flux element is arranged vertically above the coil plane and / or the flat coil, the coil plane and the flux element plane coincide and / or can be brought into coincidence.

[0017] Optionally, it is stipulated that the flux element group has and / or includes a plurality of flux elements, particularly more than two flux elements. Here, it is stipulated that two adjacent flux elements are arranged offset in the longitudinal direction and the lateral direction, where one flux element is arranged offset only in the longitudinal direction and not in the lateral direction relative to the next flux element. This design solution is based on the concept that a zigzag structure of the flux elements in the longitudinal direction is always generated in the flux element group. Due to the movement and / or displacement of the flux element group in the longitudinal direction, one of the two flat coils in the coil group is thus always alternately covered, shielded, and / or has its inductance affected by the flux elements.

[0018] Particularly preferably, the flux elements are arranged in a checkerboard pattern in the flux element group. The flux element group is, for example, divided into two halves and / or sections in the lateral direction, where, in the longitudinal direction within the halves and / or sections, the respective flux elements are arranged alternately with vacancies or with areas without flux elements. The flux element group can, for example, be understood as a matrix having rows and columns, where the flux elements and the areas without flux elements or with voids are arranged alternately both along the rows and along the columns. An area without a flux element can, for example, refer to a vacancy, a void, air, or a carrier material. Particularly preferred is the matrix-shaped division of the flux element group, which has two rows in the lateral direction and n flux elements in the longitudinal direction, where n is a natural number greater than 2, particularly greater than 4.

[0019] In particular, it is stipulated that each flux element has and / or defines a measurement surface area. The measurement surface area is, for example, a flat extension of the flux element, preferably parallel to the coil plane and particularly parallel to the metallic section of the flat extension. Here, it is stipulated that the flux elements are arranged within the flux element group such that the measurement surface areas are arranged without overlap and without vacancies in the longitudinal direction. The flux elements are, for example, configured to be rectangular, where two adjacent flux elements contact each other at the corner regions.

[0020] One design of the present invention provides that the flux element is configured as a flat metal element. The flat metal element is, for example, a metal sheet or a metal film section. The metal element is made of, for example, brass, aluminum or iron. The metal element is particularly configured as a copper sheet and / or a copper film section.

[0021] Particularly preferably, the flux element group has a carrier. The flux element is, for example, embossed, bonded, screwed, woven, sewn or coated onto the carrier. The carrier and the flux element are particularly integrally connected to each other. The carrier is preferably configured as a flat carrier, particularly having extensions in the longitudinal and transverse directions.

[0022] Particularly preferably, the carrier is configured to be flexible and / or soft. The carrier is, for example, configured as a film, plastic or metal film. Alternatively, the carrier is configured to be bend-resistant, for example, configured as a plastic plate or a metal plate.

[0023] Optionally, it is provided that the carrier forms a fabric. The carrier is, for example, configured as a knitted fabric or a woven fabric. The carrier can particularly be configured as a belt.

[0024] One design of the present invention provides that the flat coil respectively has and defines a winding plane. The winding plane particularly points in the same direction as the flux element plane. The winding of the flat coil is particularly arranged within the winding plane, for example, as a spiral winding and particularly as a square winding.

[0025] Particularly preferably, the coil group is configured and / or arranged to be stationary. The coil group is, for example, stationary and / or fixedly arranged in the sensor facility or in the housing of the sensor facility. Here, in particular, it is provided that the flux element group, the carrier and / or the flux element are configured to be movable and / or displaceable relative to the coil group, the flat coil and / or the housing of the sensor facility.

[0026] Another subject matter of the present invention forms a belt facility for a vehicle, the belt facility including a belt and a coil group. The coil group is constructed in particular as described above and / or as in the sensor facility according to any one of claims 1 to 11. Flux elements are arranged, engraved, adhered, embossed or woven on the belt. The belt or a section thereof defines a flux element plane above and / or parallel to the coil group in particular. The flux elements are arranged on the belt such that two adjacent flux elements are spaced apart from each other both in the longitudinal direction and in the transverse direction. The belt forms in particular a carrier as described for the sensor facility. The belt can move and / or be displaced relative to the coil group. The belt can move and / or be displaced relative to the coil group in the longitudinal direction in particular. By the movement and / or displacement of the belt in the longitudinal direction, the flat coils arranged in the transverse direction of the coil group are alternately covered and / or exposed by the flux elements of the flux element group. The flux elements and / or the flux element group affect the current inductance of the flat coils. The belt facility includes in particular an evaluation device, in particular an evaluation device as described previously. The evaluation device is constructed to determine the displacement and / or position of the belt, the flux elements and / or the flux element group in the longitudinal direction based on the measured current inductance. For example, for this purpose, the inductances of at least two flat coils spaced apart in the transverse direction are determined, wherein based on this determination, the arrangement and / or coverage degree of the elements can generally be determined, based on which the pull-out length and / or position of the belt can be determined.

[0027] Another subject matter of the present invention forms a method for determining displacement and / or position in the longitudinal direction and / or along the longitudinal direction. The method is constructed to detect displacement and / or position by means of the sensor facility and / or the belt facility according to any one of claims 1 - 11. The method provides herein that for each flat coil among the flat coils, the current inductance is known, and the displacement and / or position is determined based on the known current inductance. Description of the Drawings

[0028] Further advantages, effects and design solutions are derived from the drawings and their descriptions. In the drawings:

[0029] Figure 1 The coil group is shown;

[0030] Figure 2 The sensor facility as an embodiment of the present invention is shown;

[0031] Figure 3 Shown is Figure 2 the inductance change curve of the flat coils;

[0032] Figure 4 Another embodiment of the sensor facility is shown;

[0033] Figure 5 Shown forFigure 4 Inductance change curve of the sensor facility Detailed implementation mode

[0034] Figure 1 An embodiment of the coil group 1 is shown. The coil group 1 includes two flat coils 2a and 2b. The coil group 1 and the flat coils 2a, 2b are flatly constructed and define a coil plane 3, wherein the windings of the flat coils 2a, 2b are in the coil plane 3.

[0035] For the purpose of explaining the sensor facility shown later, the direction vectors 4a and 4b are shown by way of illustration. The longitudinal direction is oriented along the direction vector 4a here, wherein the transverse direction is perpendicular to the longitudinal direction and is shown by the direction vector 4b. The coil plane 3 has the same orientation as the plane spanned by the direction vectors 4a and 4b. This plane spanned by the direction vectors 4a and 4b is also referred to as the longitudinal direction - transverse direction plane.

[0036] The flat coils 2a, 2b are arranged side by side. The flat coils 2a, 2b are arranged directly side by side especially in the transverse direction. The flat coils 2a, 2b divide the coil plane 3 into two parts in the transverse direction, which are also referred to as rows 5a and 5b. The division by the flat coils 2a, 2b in the transverse direction is especially a division that each accounts for half. The flat coils 2a, 2b are thus constructed identically in terms of plane, especially in terms of area and shape.

[0037] The flat coils 2a, 2b each have a contact 6, wherein the contact 6 is used to contact the evaluation device. The evaluation device is configured to determine the respective inductance L, especially the current inductance L, of the two flat coils 2a, 2b. Here, for example, the physics and / or mathematics of the resonant circuit for measuring the interaction rate is utilized. The flat coils 2a, 2b are energized, for example, by the evaluation device via the contacts 6 with an alternating voltage of a specific frequency, and the inductance L is determined based on the response thereto.

[0038] Figure 2 An embodiment of the sensor facility 7 is shown. The sensor facility 7 includes Figure 1The coil group 1. In addition, the sensor facility 7 includes a flux element group 8. The flux element group 8 includes two flux elements 9a and 9b. The flux elements 9a and 9b are configured as flat elements made of metal. The flux elements 9a and 9b are, for example, configured as copper sheets. The flux elements 9a and 9b are arranged adjacent to each other and are in contact, in particular in the contact area 10. The contact in the contact area 10 takes place at the corner areas of the flux elements 9a and 9b. The flux elements 9a and 9b are arranged in a common plane, namely the flux element plane 11. The flux element plane 11 is arranged parallel to the coil plane 3. The coil plane 3 and the flux element plane 11 are, in particular, arranged parallel to each other. Within the flux element plane 11, the flux elements 9a and 9b are arranged offset from each other both in the longitudinal direction and in the transverse direction. This arrangement of the flux elements 9a and 9b is, in particular, in a checkerboard pattern. In other words, the arrangement of the flux elements 9a and 9b can, in particular, be regarded as being like that in opposing windmill blades.

[0039] The flux element group 8 and the flux elements 9a and 9b can be moved in the longitudinal direction. The movement takes place, in particular, within the flux element plane and / or parallel to the coil plane 3. By moving the coil group 8, the covering and / or overlaying of the flat coils 2a, 2b by the flux elements 9a and 9b is changed. The covering and / or overlaying is, in particular, understood as the flat coils 2a, 2b being covered by the flux elements 9a, 9b in a top view from above, in particular perpendicular to the coil plane 3. For example, in the illustrated figure, the flat coil 2a is completely covered and / or overlaid by the flux element 9a. The flat coil 2b is neither covered nor overlaid by the flux element 9a nor by the flux element 9b in the illustrated figure. By moving the flux element group 8, in this example to the right, the covering of the flat coil 2a is reduced and the flat coil 2b is increasingly covered by the flux element 9b.

[0040] The inductance of the flat coils 2a, 2b depends on the covering and / or overlaying by the flux elements 9a and 9b. In the example implemented here, the covering of the flat coils 2a, 2b increases the current inductance L of the flat coils 2a, 2b. Correspondingly, in the illustrated state, the currently measured inductance L1 of the flat coil 2a is greater than the currently measured inductance L2 of the flat coil 2b. By determining the two current inductances L1, L2, the evaluation device can determine the position determination of the flux elements 9a, 9b or the flux element group 8. The evaluation device is, in particular, configured to determine the displacement, for example the displacement of the flux element group 8 relative to the coil group 1, based on this determination.

[0041] Figure 3 For Figure 2The sensor facility 7 shows the measured and / or expected inductance variation curves for two flat coils 2a, 2b. In the illustration, the longitudinal displacement of the flux element group 8 relative to the coil group 1 is plotted in millimeters along the abscissa. This corresponds in particular to the measured and / or to-be-determined displacement. The inductance in nanohenries is plotted on the ordinate.

[0042] The illustration here shows the inductances L1 and L2. The inductance L1 corresponds to Figure 2 the inductance of the flat coil 2a. This flat coil is completely covered by the flux element 9a for a displacement of 0, and thus the current inductance L1 is maximum for x = 0. In this case, the maximum inductance L1 for the flat coil 2a is approximately 800 nanohenries. The inductance L2 represents Figure 2 the current inductance of the flat coil 2b. For a displacement of 0, this flat coil is completely uncovered and / or completely unshielded. The currently measured inductance L2 is thus minimum for x = 0, because this inductance can only increase through an increase in coverage. This minimum inductance for L2 is approximately 270 nanohenries. By moving the flux element group 8, for example here the flux element group 8 moving Figure 2 to the right in, the coverage of the flat coil 2a is reduced, and thus the current inductance L1 of the flat coil 2a decreases with increasing displacement. The flat coil 2b is increasingly covered by the flux element 9b through the increasing displacement, and thus an increasing inductance L2 is recorded therefor. The inductances L1 and L2 are thus opposite to each other, and thus 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 L1, L2 of the two flat coils 2a, 2b.

[0043] Figure 4 shows an embodiment of the sensor facility 7, which in turn includes two flat coils 2a, 2b in the coil group 1. The coil group 1 is constructed as Figure 1 the coil group of.

[0044] In contrast to Figure 2 the sensor facility 7 of, the flux element group 8 here includes four flux elements 9a, 9b, 9c and 9d. The flux elements 9a, 9b, 9c and 9d are arranged in a checkerboard pattern in the flux element plane, i.e., in a plane parallel to the coil plane 3. In the rows 5a, 5b, the flux elements 9a, 9b, 9c and 9d alternate with voids respectively. The voids in the rows 5a, 5b correspond to the flux elements 9a, 9b, 9c and 9d in the transverse direction in the other row 5b, 5a.

[0045] By displacement of the flux element group 8 in the longitudinal direction, each flat coil 2a, 2b is completely covered and completely exposed multiple times, here twice. The inductances L1, L2 pass through multiple minima and maxima by this movement, and they are used to determine the position and / or the displacement by means of an evaluation device.

[0046] Figure 5 For Figure 4 the sensor arrangement shows the associated inductance variation curves in the flat coils 2a, 2b. The inductance L1 of coil 2a starts with a maximum due to the maximum coverage by the flux element 9a at x = 0, where the inductance L1 becomes minimum as the displacement increases, i.e., when the flux element 9b completely covers coil 2b, and the next maximum of the inductance L1 for the displacement is reached when the flux element 9c completely covers coil 2a. For the inductance L2 of coil 2b, a similar variation curve is obtained, where this inductance starts at a minimum for x = 0 because the coil is completely not covered by the flux element here. Based on this variation curve, the displacement and / or the position in the longitudinal direction is determined by the evaluation device.

[0047] List of reference numerals

[0048] 1 Coil group

[0049] 2a, b Flat coils

[0050] 3 Coil plane

[0051] 4a, b Direction vectors

[0052] 5a, b Rows

[0053] 6 Contact

[0054] 7 Sensor arrangement

[0055] 8 Flux element group

[0056] 9a - d Flux elements

[0057] 10 Contact area

[0058] 11 Flux element plane

[0059] L1, L2 Inductances

[0060] x Longitudinal displacement

Claims

1. A sensor facility (7) for detecting the position and / or displacement of a flux element group (8) along a longitudinal direction, wherein the sensor facility has a coil group (1) and the flux element group (8), Among them, wherein the coil group (1) includes at least two flat coils (2a, b), and wherein the at least two flat coils (2a, b) are arranged in a transverse direction transverse to the longitudinal direction, wherein the flux element group (8) includes at least two flux elements (9a, b), and wherein the at least two flux elements (9a, b) are arranged adjacent to each other and offset in the longitudinal direction and the transverse direction, wherein the flux element group (8) defines a flux element plane (11) and the coil group (1) defines a coil plane (3), wherein the coil plane (3) is arranged spaced apart from the flux element plane (11), and wherein the flux element group (8) and the coil group (1) can move and / or be displaced relative to each other in the longitudinal direction, wherein the flat coils (2a, b) are configured such that the current inductance (L1, L2) of each flat coil (2a, b) depends on the current displacement of the flux element group (8) relative to the coil group (1), wherein the sensor facility has an evaluation device which is arranged to obtain the current inductance (L1, L2) for each flat coil (2a, b) and to determine the current displacement based on the obtained current inductance (L1, L2).

2. The sensor facility (7) according to claim 1, characterized in that, The flat coils (2a, b) each define a coil surface and the flux elements (9a - d) each define a flux element surface, wherein the flux element surface and the coil surface are configured to be congruent.

3. The sensor facility (7) according to claim 1 or 2, characterized in that, The flux element group (8) has a plurality of flux elements (9a - d), wherein two adjacent flux elements (9a - d) are arranged offset in the longitudinal direction and the transverse direction, and wherein the flux elements (9a - d) are spaced apart in the longitudinal direction and not offset in the transverse direction with respect to the flux elements (9a - d) arranged adjacent to the adjacent flux elements.

4. The sensor installation (7) according to claim 1 or 2, characterized in that, The flux elements (9a - d) are arranged in a checkerboard pattern in the flux element group (8).

5. The sensor installation (7) according to claim 1 or 2, characterized in that, The flux elements (9a - d) are configured as flat metal elements.

6. The sensor facility (7) according to claim 1 or 2, characterized in that, The flux elements (9a - d) each have a measurement surface area, and wherein the flux elements (9a - d) are arranged in the flux element group (8) such that the measurement surface areas are arranged without overlap and without gaps in the longitudinal direction.

7. The sensor installation (7) according to claim 1 or 2, characterized in that, The flux element group (8) has a carrier, and wherein the flux elements (9a - d) are embossed, bonded, engraved, woven and / or coated onto the carrier.

8. The sensor installation (7) according to claim 7, characterized in that, The carrier is configured to be flexible and / or soft.

9. The sensor installation (7) according to claim 7, characterized in that, The carrier forms a fabric.

10. The sensor facility (7) according to claim 1 or 2, characterized in that, The flat coils (2a, b) each have a winding plane, and wherein the flat coils (2a, b) are arranged with their winding planes in the same direction as the flux element plane (11).

11. The sensor facility (7) according to claim 1 or 2, characterized in that, The coil group (1) is configured to be stationary and the flux element group (8) is configured to be movable and / or displaceable.

12. Belt facility for a vehicle, said belt facility having a belt and a coil set (1), wherein, The coil group (1) includes at least two flat coils (2a, 2b), wherein the flat coils are arranged transversely to the longitudinal direction, wherein the belt includes a flux element group (8) having at least two flux elements (9a, d), wherein the at least two flux elements (9a, d) are arranged adjacent to each other and offset in the longitudinal direction and the transverse direction, wherein the flux element group (8) defines a flux element plane (11) and the coil group (1) defines a coil plane (3), wherein the coil plane (3) is arranged spaced apart from the flux element plane (11), wherein the flux element group (8) and the coil group (1) are movable and / or displaceable relative to each other in the longitudinal direction, wherein the flat coils (2a, b) are configured such that the current inductance (L1, L2) of each flat coil (2a, b) depends on the current displacement of the flux element group (8) relative to the coil group (1), the belt facility has an evaluation device which is arranged to obtain the current inductance (L1, L2) for each flat coil (2a, b) and to determine the current displacement and / or the pull-out length of the belt based on the obtained current inductance (L1, L2).

13. A method for determining displacement and / or position by means of a sensor facility (7) according to any one of claims 1 to 11, wherein, For each of the flat coils (2a, 2b), the current inductance (L1, L2) is obtained and the displacement and / or position is determined based on the obtained current inductance (L1, L2).

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